Last week on Top Gear (the best TV show ever) they had a car called the Atom, by a company named Ariel. Just to give you a quick run down before you visit their site and order one. The company is so small it only has 15 employees. and the car is pretty much a go kart chassis, with a 300hp honda civic type R supercharged engine. Talk about FAST!
http://www.arielatom.com/04/frames.htm
and on the show they test drive all cars they review on their own track, and it was only
.05 seconds behind the enzo ferrari!!!
ps: there are some vids and reviews from top gear and fifth gear on the bottom of the left frame.