The M635CSi somehow gets lost among the other greats of the period from BMW. Perhaps, for U.S. fans, it’s the nomenclature that’s confusing. After all, there was a M1, an M3, and a M5, but when it came to the M version of the E24, BMW stuck with the moniker M635CSi in all markets but the United States and Japan. Confounding that decision was the launch of the E28 M535i. Like the M635CSi, it had additional body pieces, special interior trim and wheels from M-Technic. But while the M535i had a fairly normal M30 under the hood, the E24 received the full-fat M88/3 that was shared with the M5. Like the European M5 production started in 1984, well before they were available to U.S. customers. But while the M5 only sold in very sparse numbers over its short production cycle (about 775 sold in Europe between 1984 and 1987), the M635i was a relative hit, with just over 3,900 selling overall – far more than made it the U.S. market. Additionally, the European models were a slightly more pure form of the design; smaller bumpers, less weight, and about 30 more horsepower on tap without catalyst.
These European spec models were offered with some color combinations and interiors that never came to the U.S. market. A great example of the combination of these factors is today’s 1986 right hand drive model in the striking “Akaziengrün” – Acacia Green Metallic: