Wow that was a poop throwing match!
Anyway, it kinda hard to compare HP numbers to cars with different displacement. Pretty unfair.
If we look back... 2.5 Duratec... 170HP... 3.0 Duratec 220HP (50+), so if you want to make it even then... 3.5 270HP (on regular of course).

Victor... I'd pick the 6
