Originally Posted by AudiS5
400 pounds? Maybe for the Coupe with a CF roof. Keep in mind this was a sedan and was most likely equipped with a moonroof.
According to THIS test
C63= 3,957 pounds
M3 3,681 pounds
Difference of 276 pounds. Also many things can influence a track time...we don't know the factors each car was driven in, tire tread, drivers etc.
don't be surprise, he will just find any chance he can to exaggerate thing to dismiss the m3.