Which 1951 Hudson model is the character Doc Hudson based on in Pixar's Cars?

Doc Hudson is based on the 1951 Hudson Hornet in Pixar's Cars.

Doc is a retired racing champion who runs a medical clinic in Radiator Springs. His vehicle design reflects the Hudson Hornet, a real American car famous for its “Fabulous Hudson Hornet” racing identity and its success in early stock-car competition.

In the film, Doc's past is initially hidden from Lightning McQueen. He eventually reveals that he won three Piston Cups before a serious crash ended his racing career. His experience gives him a perspective on fame, injury, and the way racing organizations can discard older competitors.

Paul Newman provided Doc Hudson's voice in the first Cars film. Newman had a major interest in motor racing and competed professionally, making the role especially fitting. Doc does not appear as a living character in Cars 2, but his legacy strongly influences Lightning's choices in Cars 3.