Article Summary The M30 ran from 1968 to 1995 across the E3, E9, E12, E23, E24, E28, E32, and E34, BMW's longest production engine. BMW turbocharged it for the 745i, and Alpina built a 355-hp twin-turbo version for the B10 Biturbo, briefly the fastest sedan in the world. The engine went by “M06” and “M68” internally before BMW standardized the “M30” prefix across all variants in 1981. In the late 1970s, engineers took the M30 block and developed a four-valve DOHC head for it, creating the M88 that powered the BMW M1. This is the coupe body that carried the M30 into European Touring Car Championship racing and gave the engine its motorsport credibility.