Pagani Zonda C12 F $741,000

The Zonda C12 F debuted at the 2005 Geneva Motor Show. It is the most extensive reengineering of the Pagani car yet, though it shares much with its predecessors including the 7.3 L V12. Power is increased to 602 PS (443 kW/594 hp) with a special clubsport model producing 650 PS (478 kW/641 hp). The company promises a 3.2 second sprint to 60 mph (97 km/h, a top speed over 374 km/h (225 mph) and it will be the queen in braking from 300 km/h to 0 (186 mph to 0). The Zonda F clubsport has a power to weight ratio of 521 bhp/ton (384 W/kg) . Compare, for example, the Enzo Ferrari which has a power to weight ratio of 483 bhp/ton (356 W/kg).

Ferrari Enzo $1,000,000

The Enzo Ferrari, sometimes referred to as the the Ferrari Enzo and also F60 is a 12-cylinder Ferrari supercar named after the company's founder, Enzo Ferrari. It was built in 2003 using Formula One technology, such as a carbon-fiber body, F1-style sequential shift transmission, and carbon-ceramic brake discs. Also used are technologies not allowed in F1 such as active aerodynamics. After a maximum downforce of 1709 pounds (775 kg) is reached at 186 mph (301 km/h) the rear spoiler is actuated by computer to maintain that downforce.

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.