Really nice car.
As far I remember, there were only two engines in program:
the 2,3 (M115 and since 1980 - M102),
and 2,8 (M110) engines with or without fuel injection.
BTW I was thinking, that all Coupes had the wide reflectors, what in case of the limousine and T model were until 1982 reserved only for the 6 cylinder engines.