1) Bugatti Veyron $1,700,000:

This car is the most expensive and has the most powerful engine amongst the expensive cars in the world.

It is the world’s fastest street-legal production car with a top speed of over 400 km/h.

The car comes with a W16 engine - 16 cylinders in 4 banks of 4 cylinders.

Built by Volkswagen AG subsidiary Bugatti Automobiles SAS, this expensive car is sold under the famous Bugatti marque.  This is the most powerful road-car engine in the history of expensive cars – producing between 1020 and 1040 metric hp.