What is the difference between the BMW M20 engines?

BMW M20 small-six petrol engines for E30 and E28. We list 2 versions: M20B25 (2.5 liter (2,494 cc), 126 kW (171 HP), 1985 to 1993); M20B20 (2.0 liter (1,991 cc), 95 kW (129 HP), 1977 to 1992).

The versions share the same basic design, but the power, the turbo or injection set-up, the electronics and the emission standard change. The right one for you is the one your car was built with.

The M20 family was used in chassis E30, E28, E34, Z1 and E21. Each engine in the yard is inspected in Hamburg. The code is matched to the listing, the parts on the engine are recorded, the openings are sealed and the real unit is photographed.

Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.