The first-generation Ford Mustang used a chassis derived from the Ford Falcon.
Ford developed the Mustang as a sporty, affordable car using existing Falcon components to control costs and speed production. Its unibody structure, suspension layout, and drivetrain were closely related to the compact Falcon, although the Mustang received distinctive styling and a broader range of performance options.
This shared engineering helped the Mustang reach showrooms quickly in 1964. The relationship is sometimes oversimplified: the Mustang was not simply a rebadged Falcon. It had its own body, interior, marketing identity, and later performance versions, including the Shelby models.
The Falcon connection also explains why early Mustangs could offer six-cylinder engines as well as V8s. The Mustang eventually became a separate global performance-car icon, but its original foundation was a compact family car.