E24 M6/M635CSi (1983–1989)
In 1983 BMW took the M88/3 six-cylinder engine, a modified version of the M88/1 from the BMW M1 and put it in the E24 chassis of the BMW 6-Series, creating the M635CSi (called the M6 in North America).
The M6 was critically acclaimed throughout its lifespan for its elegant, aggressive "shark-nose" styling, its luxury equipment, and its performance. A top speed of 255 km/h (158 mph)[4] makes the European version the second fastest BMW ever built next to the M1. This is due to all other BMW models being electronically restricted to 250 km/h (155 mph). However, Rug Cunninham BMW ran a bone stock 1987 BMW M6 in the La Carrera Classic Race in Mexico in 1989, and reportedly recorded a top speed of 283 km/h (176 mph) indicated. An M6 can be distinguished from other E24 models by a larger front air dam, a rear spoiler, BBS wheels, colour matching side view mirrors, M badges on the grille and back, and slightly larger front brakes.
