Lamborghini Murciélago LP640 Roadster - Their 6.5-liter V12 touts an astonishing power rating, 640 horses at 8,000 rpms, more than the competing Ferrari 599 GTB's 611. That engine enables both vehicles to reach maximum speeds of over 200 mph. And, sprinting from a standing start to 62 mph takes just about 3.4 seconds. That makes it one of the fastest-launching cars in the world.