Originally Posted by aajami
It's because the convertible was introduced before the coupe. Not that the rest of BMW's chassis designations are always chronological, but yeah.
That's true, but it makes more logical sense to follow what they started with the E9x. E90 = sedan, E91 = wagon, E92 = coupe, E93 = convertible. Then again, BMW has never shown any consistency. The E46 was just the E46 from start to finish.
Oh well... Great cars, thanks for sharing