• BMW M57

    The M57 is a water-cooled and turbocharged inline six cylinder diesel engine with common-rail-injection. It was revised twice during its production time. It ...

  • BMW M70

    The BMW M70 is a SOHC V12 petrol engine, which was BMWs first production V12 and was produced from 1987 to 1996. The BMW S70/2 engine, largely unrelated to t...

  • BMW M47

    The BMW M47 and Rover Group M47R are straight-4 Diesel engines. Variants were manufactured by BMW from 1998 to 2007. BMW gradually adopted high-pressure comm...

  • BMW M20

    The BMW M20 is a SOHC straight-six petrol engine which was produced from 1977 to 1993. It was introduced eight years after the larger BMW M30 straight-six en...

  • BMW M62

    The BMW M62 is a naturally aspirated V8 petrol engine which was produced from 1995 to 2005. A successor to the BMW M60, the M62 features an aluminium engine ...

  • BMW M43

    The BMW M43 is an SOHC four-cylinder petrol engine which was produced from 1991-2002. The M43 powered base-model cars, while higher performance models at the...

  • BMW M40

    The BMW M40 is an SOHC four-cylinder petrol engine which was produced from 1987–1994. It served as BMWs base model four-cylinder engine and was produced alon...

  • BMW M30

    The BMW M30 is a SOHC straight-six petrol engine which was produced from 1968 to 1994. With a production run of 22 years, it is BMWs longest produced engine ...

  • BMW M4

    The BMW M4 is a high-performance version of the BMW 4 Series automobile developed by BMWs motorsport division, BMW M GmbH. Part of the renumbering that split...

  • BMW M50

    The BMW M50 is a straight-6 DOHC petrol engine which was produced from 1990 to 1996. It was released in the E34 520i and 525i, to replace the M20 engine. In ...

  • BMW M5

    The BMW M5 is a high performance variant of the BMW 5 Series marketed under the BMW M sub-brand. It is considered an iconic vehicle in the sports sedan categ...

  • BMW M1

    The BMW M1 is a mid-engined sports car produced by German automotive manufacturer BMW from 1978 to 1981. In the late 1970s, Italian automobile manufacturer L...

  • BMW M60

    The BMW M60 is a naturally aspirated V8 petrol engine which was produced from 1992 to 1996. It was BMWs first V8 engine in over 25 years. The M60 was replace...

  • BMW M6

    The BMW M6 is a high-performance version of the 6 Series marketed under the BMW M sub-brand from 1983–2018. Introduced in the coupe body style, the M6 was al...

  • BMW M3

    The BMW M3 is a high-performance version of the BMW 3 Series, developed by BMWs in-house motorsport division, BMW M GmbH. M3 models have been produced for ev...

BMW M88

The BMW M88 is a straight-6 DOHC petrol engine which was produced from 1978-1989. It is based on the DOHC version of the BMW M49 engine, which was used in the BMW 3.0CSi racing cars.
The M88 was produced alongside the BMW M30 engine, as the higher performance engine. In North America up until 1989, the BMW S38 engine was used instead of the M88. In 1989, an updated version of the S38 became the worldwide replacement for the M88.
The M90 is a SOHC engine which is based on the M88/1.

1. Design
BMW engineers used DOHC valvetrain on a production engine for the first time on the M88, with the camshafts driven by a single-row timing chain. Kugelfischer fuel injection was used with individual throttle valves and the distinctive six individual throttle bodies.
The construction is an aluminium cylinder head and a cast iron block. The bore is 93.4 mm 3.68 in and the stroke is 84.0 mm 3.31 in, resulting in a displacement of 3.453 cc 210.7 cu in.

2.1. Versions M88
The M88 was the original iteration of the engine and was fitted to the BMW M1. It produced 200 kW 272 PS; 268 hp at 6.500 rpm and 330 N⋅m 243 lbf⋅ft at 5.500 rpm. A dry sump is used.
Applications:
1978-1981 M1

2.2. Versions M88/1
For the BMW M1 Procar single-make series, the M88 engine was bored out marginally to reach 3.498 cc 3.5 L. This racing version, called the M88/1, met the Group 4 regulations. This race engine produced 470 PS 350 kW; 460 hp in Procar specifications. This version had forged pistons, sharper camshafts, bigger valves, as well as oil cooling for the transmission and rear differential.
Applications:
1979-1980 Procar BMW M1

2.3. Versions M88/2
For Group 5 racing, the M88 engine was turbocharged and became known as the M88/2. It was downsleeved and had a shorter stroke to displace 3.191 cc 3.2 L, which with the 1.4 turbo factor placed it in the 4.5-liter class. This race engine produced up to 670 kW 900 hp.
Applications:
Group 5 racing cars

2.4. Versions M88/3
The M88/1 engine was modified for use in the E24 M635CSi and E28 M5 and was known as the M88/3. The Kugelfischer fuel injection was replaced with Bosch Motronic producing 210 kW 286 PS; 282 hp at 6.500 rpm and 340 N⋅m 251 lbf⋅ft at 4.500 rpm. It has a compression ratio of 10.5:1.
The M88/3 was also fitted to the South African BMW 745i, due to packaging problems with the turbocharged M102 engine which was used in other markets.
Applications:
1983-1989 E24 M635CSi
1984-1987 E23 745i South Africa only
1984-1987 E28 M5

3. M90
The M90 engine is a lower performance SOHC engine that was based on the M88/1. It utilizes the same block from the M88 and maintains the same bore and stroke, but borrows its head from the BMW M30 engine family. Different years of M90 engines used both Bosch Motronic and Bosch L-Jetronic engine management systems. Typically identified by a white L painted on the block behind the oil filter housing and coolant water passages on the side of the block.
The M90 sold in Europe and most other markets except North America used a compression ratio of 9.3:1, did not have a catalytic converter and produced 160 kW 215 hp.
Applications:
1978-1982 E23 735i
1979-1981 E12 M535i
1978-1982 E24 635CSi

BMW M3

The BMW M3 is a high-performance version of the BMW 3 Series, developed by BMWs in-house motorsport division, BMW M GmbH. M3 models have been produced for ev...

BMW M6

The BMW M6 is a high-performance version of the 6 Series marketed under the BMW M sub-brand from 1983–2018. Introduced in the coupe body style, the M6 was al...

BMW M60

The BMW M60 is a naturally aspirated V8 petrol engine which was produced from 1992 to 1996. It was BMWs first V8 engine in over 25 years. The M60 was replace...

BMW M1

The BMW M1 is a mid-engined sports car produced by German automotive manufacturer BMW from 1978 to 1981. In the late 1970s, Italian automobile manufacturer L...

BMW M5

The BMW M5 is a high performance variant of the BMW 5 Series marketed under the BMW M sub-brand. It is considered an iconic vehicle in the sports sedan categ...

BMW M50

The BMW M50 is a straight-6 DOHC petrol engine which was produced from 1990 to 1996. It was released in the E34 520i and 525i, to replace the M20 engine. In ...

BMW M4

The BMW M4 is a high-performance version of the BMW 4 Series automobile developed by BMWs motorsport division, BMW M GmbH. Part of the renumbering that split...

BMW M30

The BMW M30 is a SOHC straight-six petrol engine which was produced from 1968 to 1994. With a production run of 22 years, it is BMWs longest produced engine ...

BMW M40

The BMW M40 is an SOHC four-cylinder petrol engine which was produced from 1987–1994. It served as BMWs base model four-cylinder engine and was produced alon...

BMW M43

The BMW M43 is an SOHC four-cylinder petrol engine which was produced from 1991-2002. The M43 powered base-model cars, while higher performance models at the...

BMW M62

The BMW M62 is a naturally aspirated V8 petrol engine which was produced from 1995 to 2005. A successor to the BMW M60, the M62 features an aluminium engine ...

BMW M20

The BMW M20 is a SOHC straight-six petrol engine which was produced from 1977 to 1993. It was introduced eight years after the larger BMW M30 straight-six en...

BMW M47

The BMW M47 and Rover Group M47R are straight-4 Diesel engines. Variants were manufactured by BMW from 1998 to 2007. BMW gradually adopted high-pressure comm...

BMW M70

The BMW M70 is a SOHC V12 petrol engine, which was BMWs first production V12 and was produced from 1987 to 1996. The BMW S70/2 engine, largely unrelated to t...

BMW M57

The M57 is a water-cooled and turbocharged inline six cylinder diesel engine with common-rail-injection. It was revised twice during its production time. It ...