In Pixar’s Cars 2, what international racing series brings the main competitors together?

In Pixar’s Cars 2, the international racing series that brings the main competitors together is the World Grand Prix.

The World Grand Prix is organized by Sir Miles Axlerod as a three-race competition intended to promote Allinol, a new alternative fuel. Races take place in Tokyo, Porto Corsa, and London, giving the film settings far beyond Radiator Springs and the United States.

Lightning McQueen enters the event as a major competitor, while Mater becomes involved in an international spy plot after being mistaken for an undercover operative. The racing series therefore serves both as a sports competition and as the framework for the film’s espionage story.

The Piston Cup is a separate American stock-car championship associated with the first and third films. Cars 2 also includes fictional racing technology and fuel politics, but the central event is specifically called the World Grand Prix.