What is the title of the international racing event in Pixar's Cars 2?

The international racing event in Pixar's Cars 2 is the World Grand Prix.

The World Grand Prix is organized by former oil executive Miles Axlerod to promote Allinol, a new alternative fuel. Lightning McQueen competes for the event's championship, while Mater becomes entangled in a spy plot involving a group that opposes the race and its fuel technology.

The three principal race locations are Tokyo, Porto Corsa, and London. Each setting gives the film a distinct visual style and allows Pixar's artists to stage races on city streets, coastal roads, and a British circuit. The international format also explains why characters from different countries appear in the story.

The Piston Cup is a separate American racing series from the Cars films. McQueen's participation in the World Grand Prix does not mean that the two competitions are the same. That distinction is a common source of confusion because both events feature Lightning McQueen and use championship-style racing.