Here's a little known fact: Lamborghini started out selling tractors until its founder decided to try his hand at automobiles. The Lamborghini Aventador SV is the most ferocious car in the lineup, with its 6.5-litre V12 generating an impressive 750 horsepower, while the basic engine develops a "mere" 700. Both are paired with the only gearbox offered, a seven-speed automatic. There’s also a Roadster variant available.