The BMW M70 is a naturally-aspirated, SOHC, V12 petrol engine, which was BMW's first production V12 and was produced from 1987 to 1996. It was also the first German 12-cylinder post-war automobile engine, predating Mercedes-Benz's M120 by four years and VAG's W12 by fourteen.
BMW M70
Engine bay of a McLaren F1
A V12 engine is a twelve-cylinder piston engine where two banks of six cylinders are arranged in a V configuration around a common crankshaft. V12 engines are more common than V10 engines. However, they are less common than V8 engines.
1991 Porsche 3512 Formula One engine
1904 Craig-Dörwald racing boat engine
Two large marine engines
1917 Liberty L-12 airplane engine