|BMW M88 engine|
|Displacement||3,453 cc (211 cu in)|
|M88/1||3,453 cc (211 cu in)||203 kW (272 hp) @ 6500 rpm||330 N·m (243 lb·ft) @ 5000 rpm||93.4 mm (3.7 in)||84 mm (3.3 in)||1978–1981||BMW M1|
|M88/2||670 kW (898 hp)||Group 5 racing cars|
|M88/3||210 kW (282 hp) @ 6500 rpm||340 N·m (251 lb·ft) @ 4500 rpm||1983–1989||E28 M5, E24 M635CSi|
|M90||160 kW (215 hp) at 5,200 rpm||304 N·m (224 lb·ft) at 4,000 rpm||1978–1982||E12 M535i, E24 635CSi, E23 735i|
For Group 5 racing, the M88 engine was turbocharged and became known as the M88/2. This race engine produced up to 900 hp (670 kW).
The M88/1 engine was modified for use in the M635CSi and E28 M5, this engine was known as the M88/3. The Kugelfisher fuel injection was replaced with Bosch Motronic and the engine produced 286 hp (213 kW). It has a compression ratio of 10.5:1.
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.
- BMW S14 - Engine fitted to the E30 M3
- BMW S38 - Engine Fitted to the North American BMW M5 (E28) and BMW M6 (E24)
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|*made in East Germany as EMW|