Million-Dollar Classics: The World's Most Expensive Cars

Bugatti Chiron: 8-liter W16 quad-turbocharged engine, 1,500 horsepower, $2.6 million.

Ferrari La Ferrari: 6.3-liter V12 hybrid engine, 949 horsepower, 499 units made, $1.416 million.

McLaren P1 GTR: twin turbo 3.8-litre V8 hybrid engine, 986 bhp, limited to 35 units, $3.06 million.

Pagani Huayra: twin-turbo 6-liter V12 engine developed by Mercedes-AMG, 730 horsepower, limited to 100 units, $1.314 million. 

Koenigsegg Agera One:1: 5-liter twin-turbocharged V8 engine, 1,346 bhp, six units built, $2.8 million. 

Bugatti Veyron Grand Sport Vitesse La Finale: 8-liter, quad-turbocharged, W16 cylinder engine, 1,200 bhp, $2.5 million.

Lamborghini Veneno: 6.5-liter V12 engine, 740 bhp, 5 units built, $4.5 million. 

Porsche 918 Speedster: 4.6-liter V8 engine, 608 horsepower, 918 units made, $847,000. 

W Motors Lykan HyperSport: 3.7-litre twin-turbocharged Flat-six engine, 770 hp, seven units built, $3.4 million.