Ariel Atom V8

Power-to-Weight Ratio: 500 hp / 1,213 lbs = .41 0-60 mph: 2.3 seconds Top Speed: 168 mph What more can you say about this V8-powered go-kart besides holy f*ck sh*t? Powered by a 3.0-liter V8 crafted from two Suzuki Hayabusa engines strapped together, the Ariel Atom V8 is the king of featherweights. Face-melting speed is all this machine was created for.