Stanley is the original founder of Radiator Springs in Pixar's Cars.
The town's history is connected to Stanley, an early resident whose discovery of a natural spring led to the community's founding. A statue of Stanley stands in Radiator Springs, and the town holds a festival celebrating him. This backstory helps establish the settlement as more than a random stop on the highway.
Radiator Springs later flourished when Route 66 brought travelers through the area. Its fortunes declined after Interstate 40 bypassed the town, leaving many businesses struggling and reducing traffic. The film's emotional story is partly about preserving the community's history.
Stanley is not Doc Hudson, the retired racing champion who becomes McQueen's mentor, and he is not a contemporary resident such as Sally or Mater. Stanley belongs to the town's earlier history and founding legend.