Also known as the M6 in some markets, the M635 CSi was endowed with the same TC-four valve engine from the M1 supercar . This instantly made it the most sporty 6-Series in the line-up and started the naming scheme of using the now famous M denomination for BMW’s sportiest cars.
Producing 282 hp and 251 lb-ft of torque, the 3.5L inline 6 was a smooth operator that helped the M635 CSi accelerate from 0-62 mph in 6.4 seconds and reach a top speed of 158 mph. In a 1994 test, Road&Track ran a quarter mile time of 14.5 seconds claiming it was one of the best BMW’s they had ever driven. The car was also known for it’s racing, especially when sporting the famous Teile livery of the time.
