BMW 135i (http://www.dpccars.com/car-videos-08/12-25-08page-BMW-135i-vs-BMW-M3-e92.htm) vs BMW M3 e92 (http://www.dpccars.com/car-videos-08/12-25-08page-BMW-135i-vs-BMW-M3-e92.htm) I thought the M3 would be much faster, so the 135i with ECU is a faster car?

Well it looked to me like the M3 got a bad start and couldn't pull ahead by the end of the 1/4mile. But lets say it was a 1/2mile race it would be pretty close between a tuned 135i and a stock M3 but in that race i would take the 135i.

In race I would go with M3