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
The inline-six engine is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine balance, resulting in fewer vibrations than other designs of six or fewer cylinders.
Engine block of a BMW M20 straight-six engine (top view)
3890-litre MAN B&W 6S60MC marine diesel engine
Crankshaft with four main bearings
1978-1981 BMW M88 engine