BMW Chassis Codes & Engine Codes
 
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BMW Chassis Codes & Engine Codes

Every car manufacturer assigns an internal code designation to identify their vehicles. For BMW these are known as chassis codes and engine codes. These code systems help keep planning and development organized and avoids confusion. BMW engines are known by their M, N, B, S, P, or W codes while BMW chassis and bodies are known by their E, F, G, or U codes.
 

BMW Engine Codes


The engine codes used to be quite simple - M10 for four cylinder, M20 for small six cylinder, and M30 for the Big Six. But as the range of BMW engines expanded they needed a more meaningful code designation. The format now in use traces back to the mid-1980s. BMW engine codes are designed to provide a lot of information about the engine design and technology in a short amount of space. Standard BMW engines use a "M", "N", or "B" code. BMW M GmbH models use an "S" code. The official motorsport race engines use a "P" code.

Click on an image below to view the breakdown for each engine family.
 


BMW Motorsport S Engine Code Key

BMW M Engine Code Key

BMW N Engine Code Key
   

BMW B Engine Code Key (2020 version)

BMW B Engine Code Key (2023 version)
 


Surprisingly, BMW does not often play by its own rules and follow its own corporate logic. The technology is changing so often that even the internal logic can't agree. We've listed several engine code keys above but acknowledge there may be several other variations out there.

BMW M GmbH were also slow to adopt newer code logic. S engine codes roughly use the format of the M engine key all the way up to the S63 engine in 2009. After the S63 the S engines more closely follow the corporate code key from the N engines.

PHEV (Partial Hybrid Electric Vehicle) use an additional powertrain code for the engine + electric motor. We haven't seen a key that explains the code but it will start with "XB1". For example, the G20 330e has a "XB1142O1" powertrain consisting of the B46 gas engine and GC1P25M0 electric battery/motor. So far, all PHEV vehicles use a mostly-standard B-series gasoline engine with an additional electric battery and motor so the "XB1" code is largely irrelevant when shopping for engine parts.

Occasionally you will see engine codes that don't match the above keys and this is usually BMW using a shorthand abbreviation of the code. The "N52N" is commonly seen in BMW documents and referenced on sites such as RealOEM. For whatever reason BMW stuck an N on the end in 2007 instead of the more logical N52B30M0 (which is also referenced on BMW documents but is a mouthful to say). Our guess is they wanted to separate it from the slightly different N52K and N52O engines found in 2006 models. BMW will also sometimes combine new and old engine keys, such as an N63TU instead of N63T1. TU stands for Technical Update and indicates a new engineering feature. We can only speculate this is a habit from the old M code days when major revisions carried a TU suffix (M62TU) and BMW can't completely abandon it. 

 

BMW Chassis Codes



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The E code system we use today began in the mid-1960s with the development of the E3 'New Six' sedans. The 'E' stood for Entwicklung, which is German for "development". The number advances with each new model project. Not all E-chassis are production cars, even concept vehicles may receive an E code. By the late 2000s all of the E codes were used up and BMW switched to F chassis codes, which were replaced with G chassis codes just ten years later. The short span of F chassis codes can be attributed to the proliferation of codes for various body styles. It wasn't until the mid-2000s that BMW used a different chassis code for different body styles. Now a coupe, sedan, cabrio, and wagon have different chassis codes even though most of the engine, driveline, brakes, and suspension are all shared. It saves time by having more information and a shorter code. There were just as many F chassis models in ten years as there were E codes in the previous 40 years!

The BMW CLAR chassis is not the same as the chassis code. CLAR (Cluster Architecture) is a modular engineering platform with components that can be spread among various models (further subdivided into classes, such as UKL and GKL).

BMW model years traditionally begin in September of the previous year. A 2012 328i would be released in September, 2011 (9/2011). However, BMW often "pre-releases" models earlier in the year, especially for a facelift (LCI facelift) or for major updates. This is usually done in March or July. For example, the 2011 E92 335i, which received the new N55 engine, was released in 3/2010 but as a 2011 model. When ordering parts we may ask you for a VIN to confirm the model and any other vital information.

The rest of this page is a listing of all BMW models and their engines for the US market (along with a few interesting Euro models). This should be especially helpful when shopping for BMW parts or material to use as BMW trivia!


SeriesChassisModelEngine or Power Unit

 

i3 Series
   
 I01 Plug-In Electric Vehicle (2014-2021)
 2014-2017i3130 kW electric motor, 60 Ah capacity
 2014-2017i3 REx130 kW electric motor with 25kW gasoline range-extending engine, 60 Ah capacity
 2018i3130 kW electric motor, 94 Ah capacity
 2018i3 REx130 kW electric motor with 25kW gasoline range-extending engine, 94 Ah capacity
 2019-2021i3 (LCI)130 kW electric motor, 120 Ah capacity
 2019-2021i3 REx (LCI)130 kW electric motor with 25kW gasoline range-extending engine, 120 Ah capacity

 

i4 Series
   
 G26 Gran Coupe eDrive (2022-)
 2022-i4 eDrive35240 kW electric dual-motor
 2022-i4 eDrive40385 kW electric dual-motor
 2022-i4 M50455 kW electric dual-motor

 

i8 Series
   
 I12 Plug-In Hybrid Electric Vehicle (PHEV) (2015-2020)
 2015-2018i8 CoupeB38K15T0 (1.5L 3-cyl turbocharged, direct injection, Valvetronic) with 105 kW electric motor (combined 266 kW), 20 Ah capacity
 2018-2020i8 CoupeB38K15T0 (1.5L 3-cyl turbocharged, direct injection, Valvetronic) with 105 kW electric motor (combined 266 kW), 33 Ah capacity
 I15 Plug-In Hybrid Electric Vehicle (PHEV) (2015-2020)
 2018-2020i8 RoadsterB38K15T0 (1.5L 3-cyl turbocharged, direct injection, Valvetronic) with 105 kW electric motor (combined 266 kW), 33 Ah capacity

 

iX Series
   
 I20 Plug-In Electric Vehicle (2022-)
 2022-iX xDrive40240 kW electric dual-motor
 2022-iX xDrive50385 kW electric dual-motor
 2022-iX M60455 kW electric dual-motor

 

1 Series
   
 E82 Coupe / E88 Convertible (2008-2013)
 2008-2013128iN52B30M0, 3.0L I6 with Valvetronic
 2008-2013128iN51B30M0, 3.0L I6 with Valvetronic and SULEV emissions spec
 2008-2010135iN54B30M0, 3.0L I6 twin turbo, direct injection, with Dual VANOS
 2011-2013135iN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2011-2013135isN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2011-20121MN54B30T0, 3.0L I6 Twin Turbo, direct injection, with Dual VANOS

 

2 Series
   
 F22 Coupe / F23 Convertible (2014+)
 2014-2017228iN20B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2014-2017228i xDriveN20B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2014-2017228iN26B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2014-2017228i xDriveN26B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2018- LCI facelift230i (US)B46B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2018- LCI facelift230i xDrive (US)B46B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2014-2017M235iN55B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2014-2017M235i xDriveN55B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2014-2018M235i RacingN55B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2018- LCI faceliftM240iB58B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2018- LCI faceliftM240i xDriveB58B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2019- LCI faceliftM240i RacingN55B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 F87 (2016+)
 2016-2017M2N55B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2018 LCI faceliftM2N55B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2019M2 CompetitionS55B30T0, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 F44 GranCoupe (2020-)
 2020-228i FWD (UKL2)B46A20O1, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2020-228xi AWD (UKL2)B46A20O1, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2020-M235xi AWD (UKL2)B48A20T1, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 G42 Coupe / G43 Convertible (2023-)
 2022-230iB48B20M1 (B48P), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2022-230i xDriveB48B20M1 (B48P), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2022-M240iB58B30O1 (B58D), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2022-M240i xDriveB58B30O1 (B58D), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 G87 (2023-)
 2023-M2S58B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 U06 2-series Active Tourer (2023-)
 2023-(?)2-series Active Tourer 

 

3 Series
   
 E21 (1977-1983)
 1977-1983320iM10B18, 1.8L or 2.0L SOHC I4 with Bosch K-Jetronic CIS fuel injection
 1977-1982320/6M20B23, 2.3L I6 with Solex 4A1 carburetor
 1978-1983323iM20B23, 2.3L SOHC I6 with Bosch K-Jetronic CIS fuel injection
 E30 (1984-1992)
 1984-1985318iM10B18, 1.8L SOHC I4
 1989-1992318iM42B18, 1.8L DOHC I4
 1984-1987325eM20B27, 2.7L SOHC I6
 1984-1987325esM20B27, 2.7L SOHC I6
 1988325 ("Super E")M27B25, 2.7L SOHC I6, "i" cylinder head
 1987-1992325iM20B25, 2.5L SOHC I6
 1987-1992325isM20B25, 2.5L SOHC I6
 1988-1991325ixM20B25, 2.5L SOHC I6
 1988-1991M3S14B23, 2.3L DOHC I4
 1992M3 Evo IIIS14B25, 2.5L DOHC I4
 E36 (1992-1999)
 1992-1995318i M42M42B18, 1.8L DOHC I4
 1996-1997318i M44M44B19, 1.9L DOHC I4
 1994-1995318ic M42M42B18, 1.8L DOHC I4
 1994-1995318ic M44M44B19, 1.9L DOHC I4
 1992-1995318is M42M42B18, 1.8L DOHC I4
 1996-1997318is M44M44B19, 1.9L DOHC I4
 1998-1999323icM52B25, 2.5L I6 with Single-VANOS
 1998-1999323isM52B25, 2.5L I6 with Single-VANOS
 1992325iM50B25, 2.5L I6 (non-VANOS)
 1993-1995325iM50B25 (M50B25TU), 2.5L I6 with Single-VANOS
 1994-1995325icM50B25 (M50B25TU), 2.5L I6 with Single-VANOS
 1992325isM50B25, 2.5L I6 (non-VANOS)
 1993-1995325isM50B25 (M50B25TU), 2.5L I6 with Single-VANOS
 1996-1998328iM52B28, 2.8L I6 with Single-VANOS
 1996-1999328icM52B28, 2.8L I6 with Single-VANOS
 1996-1999328isM52B28, 2.8L I6 with Single-VANOS
 1993-1995M3 (Euro)S50B30, 3.0L I6 with Single-VANOS
 1995M3 (US)S50B30US, 3.0L I6 with Single-VANOS
 1996-1999M3 (Euro)S50B32, 3.2L I6 with Dual-VANOS
 1996-1999M3 (US)S52B32, 3.2L I6 with Single-VANOS
 E36/5 (1995-1999)
 1995318ti M42M42B18, 1.8L DOHC I4
 1996-1999318ti M44M44B19, 1.9L DOHC I4
 E46 (1999-2006)
 1998-2000320iM52B20TU, 2.0L I6 with Dual-VANOS
 2000-2006320iM54B22, 2.2L I6 with Dual-VANOS
 2000323CiM52B25TU, 2.5L I6 with Dual-VANOS
 1999-2000323iM52B25TU, 2.5L I6 with Dual-VANOS
 2001-2006325CiM54B25, 2.5L I6 with Dual-VANOS
 2001-2005325iM54B25, 2.5L I6 with Dual-VANOS
 2003-2005325iM56B25, 2.5L I6 with Dual-VANOS, SULEV emissions spec
 2001-2005325xiM54B25, 2.5L I6 with Dual-VANOS
 2000328CiM52B28TU, 2.8L I6 with Dual-VANOS
 1999-2000328iM52B28TU, 2.8L I6 with Dual-VANOS
 2001-2006330CiM54B30, 3.0L I6 with Dual-VANOS
 2001-2005330iM54B30, 3.0L I6 with Dual-VANOS
 2001-2005330xiM54B30, 3.0L I6 with Dual-VANOS
 2003-2005 (sedan)330i ZHPM54B30, 3.0L I6 with Dual-VANOS
 2004-2006 (coupe)330ci ZHPM54B30, 3.0L I6 with Dual-VANOS
 2001-2006M3S54B32, 3.2L I6 with Dual-VANOS
 E90 Sedan / E91 Sport Wagon (2006-2011)
 2006323i (CAN)N52B25M0, 2.5L I6 with Valvetronic
 2006325i, 325xiN52B30K0, 3.0L I6 with Valvetronic
 2007-2008328i, 328xiN52B30M0, 3.0L I6 with Valvetronic
N51B30M0, 3.0L I6 with Valvetronic, SULEV emissions spec
 2009-2011 LCI facelift facelit328i, 328xiN52B30M0, 3.0L I6 with Valvetronic
N51B30M0, 3.0L I6 with Valvetronic, SULEV emissions spec
 2006330i, 330xiN52B30O0, 3.0L I6 High Output with Valvetronic
 2009-2011 LCI facelift335dM57TU2D30, 3.0L I6 Twin Turbo I6 Diesel
 2007-2008335i, 335xiN54B30M0, 3.0L I6 Twin Turbo, direct injection, with Dual VANOS
 2009-2010 LCI facelift335i, 335xiN54B30O0, 3.0L I6 Twin Turbo, direct injection, with Dual-VANOS
 2011 LCI facelift335i, 335xiN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2008-2011M3 SedanS65B40, 4.0L V8 with Dual-VANOS
 E92 Coupe / E93 Convertible (2007-2013)
 2007-2010328i, 328xiN52B30M0, 3.0L I6 with Valvetronic
N51B30M0, 3.0L I6 with Valvetronic, SULEV emissions spec
 2011-2013 LCI facelift328i, 328xiN52B30M0, 3.0L I6 with Valvetronic
N51B30M0, 3.0L I6 with Valvetronic, SULEV emissions spec
 2007-2010335i, 335xiN54B30O0, 3.0L I6 Twin Turbo, direct injection, with Dual-VANOS
 2011-2013 LCI facelift335isN54B30T0, 3.0L I6 Twin Turbo, direct injection, with Dual VANOS
 2011-2013 LCI facelift335i, 335xiN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2008-2013M3S65B40, 4.0L V8 with Dual-VANOS
 2010M3 GTSS65B44, 4.4L V8 with Dual-VANOS
 F30 Sedan / F31 Sport Wagon / F34 GT (2012-2018)
 2014-2015320i, 320i X-DriveN20B20K0, 2.0L I4 Reduced Output Twin Scroll Turbo, direct injection, with Valvetronic
 2016 LCI facelift320i, 320i xDriveN20B20K0, 2.0L I4 Reduced Output Twin Scroll Turbo, direct injection, with Valvetronic
 2017-2018 LCI facelift320i, 320i X-DriveN20B20K0, 2.0L I4 Reduced Output Twin Scroll Turbo, direct injection, with Valvetronic
 2014-2015328d, 320d xDriveN47D20O1, 2.0L I4 Single Turbo Diesel
 2016-2018 LCI facelift328d, 328d xDriveN47D20O1, 2.0L I4 Single Turbo Diesel
 2012-2014328i, 328i xDriveN20B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2015-2016 LCI facelift328i, 328i xDriveN20B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
N26B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2016-2018330eB48B20M0 ("B48X"), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, PHEV
XB1142O1 (XB1H) powertrain
 2017-2018330i, 330i xDriveB46B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
all US models are B46 SULEV spec
 2012-2014335i, 335i xDriveN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2015 LCI facelift335i, 335i xDriveN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2016-2018340i, 340i xDriveB58B30M0 (B58A), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2012-2015ActiveHybrid 3N55HP, 3.0L I6 Twin Scroll Single Turbo with electric motor
 F80 Sedan (2015+)
 2015-2016M3S55B30O0, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 2017-2018 LCI faceliftM3S55B30O0, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 G20 Sedan / G21 Sport Wagon (2019-)
 2020-330eB46B20O1 ("B48X"), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, PHEV
XB1142O1 (XB1G) powertrain
 2019-2024330i, 330xiB46B20O1 (B46TU), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV
 2025-330xiB48B20M1 (B48P), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2020-2024M340i, M340xiB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2025-M340i, M340xi LCIB58B30M2 (B58TU2, B58N), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 G80 Sedan (2021-)
 2021-M3S58B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
6-speed manual only
 2021-M3 CompetitionS58B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
M8HP paddle-shift only
 2021-M3 Competition xDriveS58B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
M8HP paddle-shift only

 

4 Series
   
 F32 Coupe / F33 Convertible / F36 GranCoupe (2014-2020)
 2014-2015428i, 428i xDriveN20B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
N26B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2016-2017
2018- LCI facelift
430i, 430i xDriveB46B20M0, 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2014-2015435i, 435i xDriveN55B30M0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2016-2017
2018- LCI facelift
440i, 440i xDriveB58B30M0 (B58A), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 F82 Coupe, F83 Convertible (2015+)
 2015-2017M4S55B30O0, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 2018- LCI faceliftM4S55B30O0, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 2016M4 GTSS55B30T1, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 2018M4 CSS55B30O0, 3.0L I6 Twin Turbo, direct injection, with Valvetronic
 G22 Coupe / G23 Convertible / G26 GranCoupe (2021-)
 2021-430i, 430iXB46B20O1 (B46TU), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2025-430i xDriveB48B20M1 (B48P), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2021-2024M440i, M440iXB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2025-M440i, M440iX LCIB58B30M2 (B58TU2, B58N), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 G26 Gran Coupe (2022-)
 2022-2024430i xDriveB46B20O1 (B46TU), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic, SULEV emissions spec
 2025-430i xDriveB48B20M1 (B48P), 2.0L I4 Twin Scroll Turbo, direct injection, with Valvetronic
 2022-2024M440i xDriveB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
 2025-M440i xDriveB58B30M2 (B58TU2, B58N), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2022-i4 eDrive40HA0, single motor, rear-wheel drive
 2022-i4 M50XE2, dual motors, all-wheel drive
 G82 Coupe, G83 Convertible (2021-)
 2021-M4S58B30O0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
6-speed manual only
 2021-M4 CompetitionS58B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
M8HP paddle-shift only
 2021-M4 Competition xDriveS58B30T0, 3.0L I6 Twin Scroll Turbo, direct injection, with Valvetronic
M8HP paddle-shift only

 

5 Series
   
 E12 (1972-1981)
 1977-1981528iM30B28, 2.8L I6
 1975-1978530iM30B30, 3.0L I6
 E28 (1982-1988)
 1983-1988524tdM21D24, 2.4L I6 Single Turbo Diesel
 1982-1987528eM20B27, 2.7L I6
 1988528e "Super E"M20B27, 2.7L I6, "i" cylinder head
 1982-1984533iM30B32, 3.2L I6
 1985-1988535iM30B34, 3.5L I6
 1985-1988M535i (Euro)M30B34, 3.5L I6
 1988M5M88/3, 3.5L I6 (Euro)
S38B35, 3.5L I6 (US)
 E34 (1989-1995)
 1989-1990525i M20M20B25, 2.5L SOHC I6
 1993-1995525i M50M50B25, 2.5L I6 with Single-VANOS
 1993-1995530iM60B30, 3.0L V8
 1989-1992535iM30B34, 3.4L I6
 1993-1995540iM60B40, 4.0L V8
 1995540i M-SportM60B40, 4.0L V8
 1991-1995M5S38B36, 3.6L I6
 1994-1995M5 (Euro)S38B38, 3.8L I6
 E39 (1997-2003)
 2001-2003525iM54B25, 2.5L I6 with Dual-VANOS
 1997-1998528iM52B28, 2.8L I6 with Single VANOS
 1999-2000528iM52B28TU, 2.8L I6 with Dual-VANOS
 2001-2003530iM54B30, 3.0L I6 with Dual-VANOS
 1997-1998540iM62B44, 4.4L V8
 1999-2003540iM62B44TU, 4.4L V8 with Single VANOS
 1999-2003M5S62B50, 4.9L V8 with Dual-VANOS
 E60 Sedan / E61 Sport Wagon (2004-2010)
 2004-2005525iM54B25, 2.5L I6 with Dual-VANOS
 2006525i, 525xi (US)N52B30M0, 3.0L I6 with Valvetronic
 2007-2010528i, 528i xDriveN52B30M1, 3.0L I6 with Valvetronic
 2004-2005530iM54B30, 3.0L I6 with Dual-VANOS
 2006-2007530i, 530xiN52B30O0, 3.0L I6 High Output with Valvetronic
 2007-2010535i, 535i xDriveN54B30M0, 3.0L I6 Twin Turbo with Dual VANOS
 2004-2005545iN62B44M0, 4.4L V8 with Valvetronic
 2006-2010550iN62B48M0, 4.8L V8 with Valvetronic
 2006-2010M5S85B50, 5.0L V10 with Dual-VANOS
 F07 GT, F10 Sedan (2011-2016)
 2011528i, 528i xDriveN52B30M0, 3.0L I6 with Valvetronic
 2012-2016528i, 528i xDriveN20B20M0, 2.0L I4 Twin Scroll Turbo with Valvetronic
 2011-2016535d, 535d xDriveN57D30O1, 3.0L I6 Single Turbo Common Rail Direct Injected Diesel
(similar in spec to Euro 530d)
 2011-2016535i, 535i xDriveN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2012-2016ActiveHybrid 5 (535i)N55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic and Lithium-Ion battery power
 2011-2013550i, 550i xDriveN63B44O0, 4.4L V8 Twin Turbo
 2014-2016550i, 550i xDriveN63B44O1 (N63TU), 4.4L V8 Twin Turbo with Valvetronic
 2012-2016M550d xDrive (Euro)N57S, 3.0L I6 Triple Turbo Diesel
 2012-2016M5S63B44T1, 4.4L V8 Twin Turbo
 G30 (2017-)
 2017-2019530i, 530i xDriveB46B20M0 (B46A or B46O), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2020-530i, 530i xDriveB46B20M1 (B46TU or B46D), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2017-2019530e, 530e xDriveB48B20O0 ("B48X"), 2.0L Twin Scroll Turbo with Valvetronic
XB1142O1 powertrain
 2017-2019540i, 540i xDriveB58B30M0 (B58A), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2020-540i, 540i xDriveB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2018-2019M550i, M550i xDriveN63B44O2 (N63R), 4.4L V8 Twin Turbo with Valvetronic
 2020-M550i, M550i xDriveN63B44T3, 4.4L V8 Twin Turbo with Valvetronic
 F90 (2018-)
 2018-M5S63B44T4, 4.4L V8 Twin Turbo with Valvetronic
 G60 (2024-)
 2024-530iB48B20O2 ("B48P"), 2.0L Twin Scroll Turbo, direct injection, with Valvetronic
 2024-530i xDriveB48B20O2 ("B48P"), 2.0L Twin Scroll Turbo, direct injection, with Valvetronic
 2024-540i xDriveB58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2024-i5 eDrive40HA0, single motor, rear-wheel drive
 2024-i5 M60 xDriveXE2, dual motors, all-wheel drive

 

6 Series
   
 New Class (1965-1969)
 1965-19692000CM10B20, 2.0L I4, single carburetor
 1965-19692000CSM10B20, 2.0L I4, twin carburetor
 E9 Coupe (1968-1975)
 1968-19712800CSM30B28, 2.8L I6, twin carburetors
 1972-19753.0CSM30B30, 3.0L I6, twin carburetors
 1972-19753.0CSiM30B30, 3.0L I6, Bosch D-Jetronic fuel injection
 1972-19733.0CSLM30B30, 3.0-3.2L I6, twin carburetors
 1974-19753.0CSiLM30B32, 3.2L I6, Bosch D-Jetronic fuel injection
 E24 (1977-1989)
 1977630CSiM30B30, 3.0L I6
 1982-1984633CSiM30B32, 3.2L I6
 1985-1989635CSi, L6M30B35, 3.5L I6
 1983-1989M635CSi (Euro)M88/3, 3.4L I6
 1987-1989M6S38B35, 3.5L I6
 E63 Coupe / E64 Convertible (2004-2010)
 2004-2005645CiN62B44M0, 4.4L V8 with Valvetronic
 2006-2011650iN62B48M0, 4.8L V8 with Valvetronic
 2006-2010M6S85B50, 5.0L V10 with Dual-VANOS
 F06 GranCoupe / F12 Convertible / F13 Coupe (2012-2017)
 2012-2017640iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2012650i, 650i xDriveN63B44O0, 4.4L V8 Twin Turbo with Valvetronic
 2013-2017650i, 650i xDriveN63B44O1 (N63TU), 4.4L V8 Twin Turbo with Valvetronic
 2012-2018M6S63B44T1, 4.4L V8 Twin Turbo with Valvetronic
 G32 Gran Turismo / G33 Gran Coupe (2018+)
 2018-640i, 640i xDriveB58B30O0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2018-640i, 640i xDrive (G33?)B58B30O0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2018-640d, 640d xDriveN57S, 3.0L I6 Triple Turbo Diesel

 

7 Series
   
 E23 (1977-1987)
 1978-1984733iM30B32, 3.2L I6
 1985-1987735i, L7M30B34, 3.4L I6
 1980-1983745i (Euro)M106, 3.4L I6 Single Turbo
 1984-1986745i (South Africa)M88/3, 3.5L I6
 E32 (1988-1994)
 1988-1992735i, 735iLM30B35, 3.5L I6
 1993-1994740i, 740iLM60B40, 4.0L V8
 1989-1994750iLM70B50, 5.0L V12
 E38 (1995-2001)
 1995740i, 740iLM60B40, 4.0L V8
 1996-1998740i, 740iLM62B44, 4.4L V8
 1999-2001740i, 740iLM62B44TU, 4.4L V8 with Single VANOS
 1995-1997750iLM73B54, 5.4L V12 SOHC
 1998-2001750iLM73TUB54, 5.4L V12 SOHC
 E65 SWB / E66 LWB (2002-2008)
 2002-2004745i, 745LiN62B44M0, 4.4L V8 with Valvetronic
 2005-2008750i, 750LiN62B48M0, 4.8L V8 with Valvetronic
 2002-2008760LiN73B60, 6.0L V12 with Valvetronic
 2004-2008Alpina B7N62B48, 4.8L Supercharged V8
 F01 SWB / F02 LWB (2009-2015)
 2008-2012740i, 740LiN54B30M0, 3.0L I6 Twin Turbo with Dual VANOS
 2013-2015740i, 740LiN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2009-2012750i, 750Li, 750Li xDriveN63B44O0, 4.4L V8 Twin Turbo
 2013-2015750i, 750Li, 750Li xDriveN63B44O1 (N63TU), 4.4L V8 Twin Turbo
 2009-2015760LiN74B60, 6.0L V12 Twin Turbo with Dual-VANOS
 2010-2015Alpina B7N63-M1/1, 4.4L V8 Twin Turbo with Valvetronic
 G11 SWB / G12 LWB (2016-)
 2016-2019740i, 740LiB58B30O0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2020-740i, 740LiB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2016-750i, 750Li, 750Li xDriveN63B44O2 (N63TU2), 4.4L V8 Twin Turbo with Valvetronic
 2016-M760Li xDriveN74B66, 6.0L V12 Twin Turbo with Dual-VANOS
 2016-Alpina B7 xDriveN63M30, 4.4L V8 Twin Turbo with Valvetronic
 G70 SWB / G71 LWB (2023-)
 2023-740i / 740i xDriveB58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2023-760i xDriveS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid
 2023-i7 xDrive60XE2, dual motors, all-wheel drive

 

8 Series
   
 E31 (1990-1998)
 1994-1995840CiM60B40, 4.4L V8
 1996-1998840CiM62B44, 4.4L V8
 1991-1994850iM70B50, 5.0L V12 SOHC
 1994-1998850CiM73B54, 5.4L V12 SOHC
 1992M8 (prototype)S70B60 (S70), 6.0L V12 with Dual-VANOS
 1994-1998850CSiS70B56 (S71), 5.6L V12 SOHC
 G14 Convertible / G15 Coupe / G16 GranCoupe (2018-)
 2019-840iB58B30O0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2019-850iN63B44T0 (N63TU3), 4.4L V8 Twin Turbo with Valvetronic
 F91 Convertible / F92 Coupe / F93 GranCoupe (2018-)
 2019-M8S63B44T1 ("S63M"), 4.4L V8 Twin Turbo with Valvetronic

 

X1 Series
   
 E84 (2009-2015)
 2009-2015X1 xDrive28iN20B20M0, 2.0L I4 Twin Scroll Turbo with Valvetronic
 2009-2015X1 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 F48 (2016-)
 2016-2019X1 xDrive28iN20B20M0, 2.0L I4 Twin Scroll Turbo with Valvetronic
 2020-X1 xDrive28iB46A20O0 (B46TU), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 U11 (2023-)
 2023-X1 xDrive28iB48B20O2 ("B48P"), 2.0L Twin Scroll Turbo, direct injection, with Valvetronic
 2024-X1 M35i xDriveB48B20T2 ("B48R"), 2.0L Twin Scroll Turbo, direct injection, with Valvetronic
 2023-iX1 sDrive 

 

X2 Series
   
 F39
 2018-2019X2 sDrive28iB46A20O0, 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2018-2019X2 xDrive28iB46A20O0, 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2020-X2 sDrive28iB46A20O0 (B46TU), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2020-X2 xDrive28iB46A20O0 (B46TU), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2019-2023X2 M35iB48A20T0, 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2023-X2 M35iB48B20T2 ("B48R"), 2.0L Twin Scroll Turbo, direct injection, with Valvetronic

 

X3 Series
   
 E83 (2003-2010)
 2003-2005X3 2.5iM54B25, 2.5L I6 with Dual-VANOS
 2003-2006X3 3.0iM54B30, 3.0L I6 with Dual-VANOS
 2007-2010 LCI faceliftX3 xDrive 3.0siN52B30O0, 3.0L I6 High Output with Valvetronic
 F25 (2011-2017)
 2011X3 xDrive28iN52B30M0, 3.0L I6 with Valvetronic
 2012-2017X3 xDrive28iN20B20O0, 2.0L I4 Twin Scroll Turbo Valvetronic
 2012-2017X3 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 G01 / G08 (2018-)
 2018-2019X3 xDrive30iB46B20M0 (B46A or B46O), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2020-2024X3 xDrive30iB46B20M1 (B46TU or B46D), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2018-2019X3 M40iB58B30M0 (B58A), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2020-2024X3 M40iB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2020-2024X3 xDrive30eB46B20O0, 2.0L I4 Twin Scroll Turbo with Valvetronic, PHEV
XB1142O1 powertrain
 2021-iX3 sDrive75e 
 F97 (2020-)
 2020-2024X3MS58B30T0, 3.0L I6 Twin Scroll Turbo with Valvetronic

 

X4 Series
   
 F26 (2014-2018)
 2014-2018X4 xDrive28iN20B20O0, 2.0L I4 Twin Scroll Turbo Valvetronic
 2014-2018X4 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2015-2018X4 M40iN55B30T0, 3.0L I6 Top Output Twin Scroll Turbo with Valvetronic
 G02 (2019-)
 2019X4 xDrive30iB46B20M0 (B46A or B46O), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2020-2024X4 xDrive30iB46B20M1 (B46TU or B46D), 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2019X4 M40iB58B30M0 (B58A), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2020-2024X4 M40iB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo with Valvetronic
 F98 (2020-)
 2020-2024X4MS58B30T0, 3.0L I6 Twin Scroll Turbo with Valvetronic

 

X5 Series
   
 E53 (2000-2006)
 2000-2006X5 3.0iM54B30, 3.0L I6 with Dual-VANOS
 2000-2003X5 4.4iM62B44TU, 4.4L V8 with Single VANOS
 2004-2006X5 4.4iN62B44O0, 4.4L V8 with Valvetronic
 2002-2003X5 4.6isM62B46TU, 4.6L V8 with Single VANOS
 2004-2006X5 4.8isN62B48O0, 4.8L V8 with Valvetronic
 E70 (2007-2013)
 2007-2010X5 3.0siN52B30O0, 3.0L I6 with Valvetronic
 2011-2013X5 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2009-2013X5 xDrive35dM57Y, 3.0L I6 Twin Turbo Diesel
 2007-2010X5 4.8iN62B48O0, 4.8L V8 with Valvetronic
 2011-2013X5 xDrive50iN63B44O0, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2010-2013X5 MS63B44O0, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 F15 (2014-2018)
 2014-2018X5 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2014-2018X5 xDrive40dN57D30O1, 3.0L I6 Single Turbo Common Rail Direct Injected Diesel
(similar in spec to Euro X5 30d)
 2014-2018X5 xDrive50iN63B44O1 (N63TU), 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 F85 (2014-2019)
 2014-2019X5 MS63B44T2, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 G05 (2019-)
 2019-2023X5 sDrive40i (RWD)B58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2024-X5 sDrive40i (RWD)B58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2020-2023X5 xDrive40iB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2024X5 xDrive40iB58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2019-2020X5 xDrive50iN63B44M3, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2020-2023X5 M50iN63B44T3, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2024-X5 M60iS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid
 2019-2023X5 xDrive45eB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
XB1151M1 powertrain
 2024-X5 xDrive50eB58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
XB1N powertrain, SP54 battery
 F95 (2020-)
 2020-2023X5 MS63B44T4, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2024-X5 MS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid

 

X6 Series
   
 E71 (2009-2013)
 2009-2010X6 xDrive35iN54B30M0, 3.0L I6 Twin Turbo with Dual-VANOS
 2010-2013X6 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2009-2013X6 xDrive50iN63B44O0, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2010-2013X6 MS63B44O0, 4.4L Twin Scroll Twin Turbo Valvetronic V8
 F16 (2014-2019)
 2014-2019X6 sDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2014-2019X6 xDrive35iN55B30M0, 3.0L I6 Twin Scroll Turbo with Valvetronic
 2014-2019X6 xDrive50iN63B44O1 (N63TU), 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 F86 (2014-2019)
 2014-2019X6 MS63B44T2, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 G06 (2020-)
 2020-2023X6 sDrive40iB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2020-2023X6 xDrive40iB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2024-X6 xDrive40iB58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2020X6 xDrive50iN63B44M3, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2021-2023X6 M50iN63B44M3, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2024-X6 M60iS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid
 F96 (2020-)
 2020-2023X6 MS63B44T4, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2024-X6 MS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid

 

X7 Series
   
 G07 (2019-)
 2019-2022X7 xDrive40iB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 2023-X7 xDrive40iB58B30M2 (B58N, B58TU2), 3.0L I6 Twin Scroll Turbo, dual injection, eVANOS, 48V mild hybrid
 2019-2020X7 xDrive50iN63B44M3, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2021-2022X7 M50iN63B44T3, 4.4L V8 Twin Scroll Twin Turbo with Valvetronic
 2023-X7 M60iS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid

 

X8 Series
   
 G98 (2025?)
 2025?X8 xDrive 
 G99 (2025?)
 2025?X8M 

 

XM Series
   
 G09 (2023-)
 2023-XMS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid
XB1T powertrain
 2023-XM Label RedS68B44T0, 4.4L V8 Twin-Scroll Twin Turbos, Valvetronic, 48V mild hybrid
XB1T powertrain

 

Z Series
   
 Z1 (1989-1991)
 1989-1991Z1M20B25, 2.5L SOHC I6
 E36/7 Roadster / E36/8 Coupe Z3 (1997-2002)
 1997Z3 1.9M44B19, 1.9L DOHC I4
 1999-2000Z3 2.3M52B25TU, 2.5L I6 with Dual-VANOS
 2001-2002Z3 2.5M54B25, 2.5L I6 with Dual-VANOS
 1997-1998Z3 2.8M52B28, 2.8L I6 with Single VANOS
 1999-2000Z3 2.8iM52B28TU, 2.8L I6 with Dual-VANOS
 2001-2002Z3 3.0M54B30, 3.0L I6 with Dual-VANOS
 1998-2000Z3 MS52B32, 3.2L I6 with Single-VANOS
 2001-2002Z3 MS54B32, 3.2L I6 with Dual-VANOS
 E85 Roadster / E86 Coupe Z4 (2003-2008)
 2003-2005Z4 2.5i M54M54B25, 2.5L I6 with Dual-VANOS
 2003-2005Z4 3.0i M54M54B30, 3.0L I6 with Dual-VANOS
 2006-2008Z4 3.0iN52B30M0, 3.0L I6 with Valvetronic
 2006-2008Z4 3.0siN52B30O0, 3.0L I6 High Output with Valvetronic
 2006-2008Z4 MS54B32, 3.2L I6 with Dual-VANOS
 E89 Z4 (2009-2016)
 2011-2016Z4 sDrive28iN20B20M0, 2.0L I4 Twin Scroll Turbo with Valvetronic
 2009-2010Z4 sDrive30iN52B30M0, 3.0L I6 with Valvetronic
 2009-2016Z4 sDrive35iN54B30M0, 3.0L I6 Twin Turbo with Dual-VANOS
 2009-2016Z4 sDrive35isN54B30O0, 3.0L I6 Twin Turbo High Output with Dual-VANOS
 G29 Z4 (2020-)
 2020-Z4 sDrive30iB46B20M0, 2.0L I4 Twin Scroll Turbo with Valvetronic, SULEV
 2020-Z4 M40iB58B30O1 (B58TU, B58D), 3.0L I6 Twin Scroll Turbo with Valvetronic
 E52 (2000-2004)
 1999-2003Z8S62B50, 4.9L V8 with Dual-VANOS
 2003-2004Alpina Z8Alpina F5 ("M62B48TU", a M62TU with larger bore and stroke for 4.8L)

 

McLaren F1
   
 F1 (1993-1998)
 1993-1998F1S70/2 (S72, S73, S74), 6.1L V12 with Double-VANOS
(McLaren-specific engine design with contemporary technology)

 

Toyota Supra
   
 Mk V A90 (2019-)
 2019-SupraB58B30M1 (B58C), 3.0L I6 Twin Scroll Turbo with Valvetronic
 

 


 

Epilogue

A few bits of BMW trivia, facts, and figures (to keep you on the page).

1. Everyone believes the BMW roundel emblem is a "whirling propeller". That idea came from BMW advertising in the late 1920s. The emblem predates that advertising campaign and actually represents the official colors of Munich.

2. You might think that the last two numerals in a BMW model represent its engine size. And in the past you might be correct. But since the late 1990s the badge represents the power class. BMW has had a long tradition of bumping up the displacement for turbocharged models. And now that every BMW engine is a turbo the naming logic continues. Examples:
- E23 745i uses a turbocharged 3.2-liter engine (M102/M106). The logic dictates that the new turbocharged engine output equals a larger, 4.5-liter engine.
- E46 323i uses a naturally-aspirated 2.5-liter 6-cylinder engine (M52TU). But it's 169hp keeps it to a "23i" classification. Note the later E46 325i also uses a 2.5-liter but with 184hp.
- E90 325i/328i/330i models all use a naturally-aspirated 3.0-liter 6-cylinder engine (N52) but because they all had different power outputs they received different model names. 25i = 215hp, 28i = 231hp, 30i = 255hp.
- E90 335i uses a twin-turbocharged 3.0-liter engine (N54/N55) that, theoretically, puts out the same horsepower as a 3.5-liter engine.
- F44 M235i uses a turbocharged 2.0-liter 4-cylinder engine, yet carries a "35i" badge. There are two things at play here: one is that it's part of the M Sport line of cars, so it's a high-performance model. Two, is that its B48 engine puts out 300+ hp, which puts it into the "35i" power class.
- G20 M340i is not a 4.0-liter but it's 3.0-liter single-turbo engine has the same theoretical output that a 4.0-liter would (382hp).

3. The S70 engine used in the McLaren F1 is not the same engine as used in the E31 850CSi or M8 prototype. This is confusion and misunderstanding of BMW's engine codes. As explained at the top of this page, S is the prefix for a BMW M Gmbh engine, developed by M engineers (Paul Rosche). 7 is the code for a V12. 0 identifies the development phase of the engine (0-9). By code alone all engines in the F1, F1 GTR, 850CSi, and M8 are "S70" engines but they are not the same engine. BMW could have done a better job at naming the engines, S70, S71, S73, S74, etc. They did try to distinguish them with S70/2 and S70/3 designations but the suffix is easily dropped, leading to confusion.

The F1 and E31 M8 engines are very close - step-brothers perhaps. The timelines align very closely and they likely have much in common. We haven't been able to confirm all of the specs but we believe the M8 has: 6.0-liter displacement, 24-valve heads per side, coil-on-plug ignition, individual throttle bodies, and a dry-sump oil system. But Gordon Murray and McLaren determined that the M8 engine was too large and heavy. Ever the innovator, Rosche said, “We'll do a new engine.” At the time, Rosche already had the E36's Euro S50 engine under development. The S50B30 engine shared these technical features, and added VANOS variable valve timing. The visual similarities between the S50 and S70/2 are obvious. The S70/2 looks very much like two S50s siamesed together. The M8 S70/1 is very different, even with the limited photos available. All of those features are absent on the 850CSi engine.

This doesn't make the CSi engine any less of an ///M product. It was built by M engineers and produced by BMW M. and remains a powerful halo model for the E31 line. The M8 engine is not the same as used in the F1 but its technology and ideas migrated to the McLaren customer program and then found their way into the Euro S50 (which then became the S54). The M8 has become an important, but misunderstood, stepping stone in the development of the F1 and other Motorsport engines. While the F1 has became the most-famous member of the S70 family and it's DNA came from the very best of BMW's engineering talent. Tips of the hat to Hagerty Insurance, BMWBlog, Peloton25, and the McLaren F1 Driving Ambition book for the extensive background and inside knowledge.

 

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