| Well honestly i dont know the answers to a lot of that. I know it has different rear, side, and front body parts (ground effects), i dont know what the correct terminolgy is.
The engine is definitely different. Says "M Power" on it. 3.2 V6...328i is a 2.8.
The rear tires are wider than the front and camber out a bit more. Stripes on the seats, colored stitching on the steering wheel.
Let me put it this way...i was convinced that i wanted a 2000 or newer 3 series, but then i test drove this 98 M3 sedan and had to have it. No comparison.
You'll have to get someone else to answer your racing questions. My question to you is, if you plan to race it, what the hell do you want an auto for???? | 
