M20

The BMW M20 was a straight-6 SOHC piston engine produced from 1977-1993. Like the larger capacity M30 engine it was produced alongside, the M20 has 12 valves. While the M30 camshaft is chain driven, the M20 camshaft and auxiliary shaft are driven by a timing belt. Initially released with a carburetor, later models used Bosch fuel injection.