The race in which Doc Hudson was a three-time champion in Pixar’s Cars is the Piston Cup.
Doc Hudson was once known as the Fabulous Hudson Hornet and won three Piston Cups before a crash ended his racing career. His achievements are revealed after Lightning McQueen discovers that the quiet doctor of Radiator Springs was once a famous champion.
The Piston Cup is the main racing championship in the first Cars film. Lightning competes for it against Chick Hicks and The King, and the final race shows that sportsmanship matters more to him than claiming the trophy at any cost.
The name can be confused with individual race titles and later competitions. Dinoco is a racing sponsor and team brand, while the World Grand Prix is the international series featured in Cars 2. The Piston Cup is the championship associated with Doc’s three victories and Lightning’s original ambition.