Porto Corso in Pixar's Cars 2 represents Italy.
The fictional coastal city hosts the second race of the World Grand Prix. Its name, architecture, harbor, and Mediterranean setting evoke Italian seaside locations, while the race course passes through streets, bridges, and waterfront scenery.
Cars 2 uses fictionalized locations rather than presenting every setting as a literal real-world city. Tokyo and London are recognizable real cities, but Porto Corso was created for the film's international racing route. This makes it easy to confuse the setting with Monaco, another famous European location associated with glamorous motorsport.
The Porto Corso race is also important to the film's plot because the World Grand Prix is connected to the alternative fuel Allinol and to a larger espionage conspiracy. McQueen focuses on racing, while Mater's accidental involvement with spies uncovers the threat behind the competition.