If you read the thread over on the M3 forum, it is hinted at that they dynoed at the same place; that is how they met and decided to set up a race.Originally Posted by MidKnight
Either way, it is definitely the gearing, slightly less power, and drag that did the STi in. In regards to drag, sure the drag co-efficients are the same for the two cars but the frontal area differences are probably pretty different.
I also don't think the STi lost THAT badly. I certainly wouldn't be ashamed to lose to a 416whp M3...
The really interesting race they are setting up is with a Porsche 911 X50. That thing should be more of a challenge...it is heavier but also more aerodynamic (I think).