Lamborghini Veneno Roadster – Price tag $4 million

This is the most expensive and the rarest car on the list with only nine units known to be in existence today. The engine is twelve-cylinder 6.5L producing 750 horsepower capable of attaining top speed of 355 km/h (221 mph). The first thing that strikes the viewer is how wide this Lamborghini is. It is specifically designed this way for a better road grip. The entire car is made from carbon fibre-reinforced polymer build keeping its weight very light (hence the width to keep it close to the road surface).