Koenigsegg CCX $600,910

The Koenigsegg CCX is the latest supercar from Koenigsegg. CCX is an abbreviation for Competition Coupe X. The X commemorates the 10th anniversary of the completion and test drive of the first CC vehicle in 1996. The CCX is intended to be more suitable for the U.S. market and thus engineered to comply with US regulations. The CCX is powered by a Koenigsegg designed and assembled, all aluminium, 4700 cm³ DOHC 32-valve V8 based on the Ford Modular engine architecture enhanced with twin Rotrex centrifugal superchargers with response system, 1.2 bar boost pressure and an 8.2:1 compression ratio. The engine produces 806 hp (601 kW) and 678 lbf.ft (920 Nm) on 91 octane (U.S. rating) gasoline, 850 hp (634 kW) on 96 octane (Euro rating) gasoline and 900 hp (671 kW) on biofuel.

Top 10 most expensive cars in the world

Bugatti Veyron $1,700,000

The Bugatti Veyron 16.4 is the most powerful, most expensive, and fastest street-legal production car in the world, with a proven top speed of over 400 km/h (407 km/h or 253 mph). It reached full production in September 2005. The car is built by Volkswagen AG subsidiary Bugatti Automobiles SAS and is sold under the legendary Bugatti marque. It is named after racing driver Pierre Veyron, who won the 24 hours of Le Mans in 1939 while racing for the original Bugatti firm. The Veyron features a W16 engine—16 cylinders in 4 banks of 4 cylinders.

According to Volkswagen, the final production Veyron engine produces between 1020 and 1040 metric hp (1006 to 1026 SAE net hp), so the car will be advertised as producing "1001 horsepower" in both the US and European markets. This easily makes it the most powerful production road-car engine in history.