Originally Posted by Nine
I don't think the M3 really competes with the GT500 or the ZL1. Balance is what sells the M3 not power.
I agree. The ZL1 is a track-spec Camaro. So it is probably more on par with the M3 GTS, if anything. GT500 is also in its own class of straight line performance. I doubt it would keep up with the M3 (except maybe on a track with lots of straights). I don't think the M3 should ever surpass 500hp from the factory. If that were to happen, then the M5/6 might need to be pushed to 600hp at least.