Originally Posted by xilli
I think you're severly underestimating the ability of a 6 cylinder motor with forced induction.
For some reason, BMW isn't pushing too hard on FI. Look at 335, 3liter engine with 300hp with 2 turbos... I remember a version of EVO was getting 200hp/liter. But than it had 1 minute turbo lag... So maybe that's why BMW is not pushing too much on hp/liter? In short, don't expect BMW to get close to 500hp with the new M3.
Sure it can be modded, but I'm not sure if it is long term reliable.