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 engine, which remained in production alongside the M20.
BMW M20
M20 engine- exhaust side
M20 engine- intake side
M20 engine- block
The BMW M30 is a SOHC straight-six petrol engine which was produced from 1968 to 1995. With a production run of 27 years, it is BMW's longest produced engine and was used in many car models.
BMW M30
BMW M30 with carburettor in BMW Museum
M30 production in Munich
M30 production in Munich