The BMW E24 series started in 1976
All the people I know are saying that this was the most beautiful BMW cupe, I have to say that I absolutely agree with them.
Production started in March 1976 with two models: the 630CS and 633CSi. Originally the bodies were manufactured by Karmann, but production was later taken in-house to BMW.
In Europe, 1984 saw the introduction of the M635CSi, essentially an E24 powered by the powerplant of the BMW M1 (the M88, now putting out 286 PS (282 hp/210 kW)). 16" BBS 3 piece wheels and a deeper air dam completed the package. Most M635csi's were equipped with 415 mm Metric Wheels requiring Michelin TRX tires.