What competition does Pixar's Cars 2 center on?

Pixar's Cars 2 centers on the World Grand Prix.

The fictional race is organized by oil magnate Sir Miles Axlerod to promote Allinol, a supposedly clean alternative fuel. It takes place in three major locations: Tokyo, Porto Corsa, and London. Lightning McQueen enters as a competitor, while Mater becomes entangled in an international spy investigation surrounding the event.

The World Grand Prix gives Cars 2 a broader international setting than the first film, which focuses largely on Radiator Springs and American racing culture. Its story combines racing with espionage, using real-world city imagery and famous landmarks as visual settings.

The Piston Cup belongs primarily to the first film's American stock-car storyline. The World Rally Championship is a real motorsport series, but it is not the competition organized in Cars 2.