Luigi in Pixar's Cars is represented by a Fiat 500.
Luigi is the owner of Luigi's Casa Della Tires in Radiator Springs and is known for his enthusiasm for Ferrari. His small, rounded design is based on the Fiat 500, the famous Italian city car produced by Fiat beginning in 1957.
The character's Italian identity and tire-shop setting connect him to the country's automotive culture. His friendship with Guido, a small forklift, also forms one of the film's most recognizable partnerships. Luigi's admiration for Ferrari becomes especially important when a Ferrari visits Radiator Springs near the end of the story.
Luigi is not a Ferrari himself. That is a common mix-up because Ferrari is his favorite marque and because the film highlights his devotion to the brand. His own model is the Fiat 500.