http://www.koenig-specials.com/ferrari/ferrari.html
Check this out:
Go to Ferrari 360, engine tuning, and performance.. Then go to Ferrari 550, engine tuning, and performance.. The 550 has much more horsepower, but they're the same speed on the quarter mile.. 360 has a lighter chassis, so it'll probably be better at cornering too.. I always thought the 360 would never beat the extra 100-200 horses, but i guess it's not possible.. Sort of like Rage vs Kenny, only Rage can't win :p