Aircraft and aeronautics have been a frequent source of inspiration for cars, whether it was aesthetic elements such as cones and fins, functional aerodynamics to increase top speed and cornering capabilities, or simply their names. Most automotive historians agree that the Ford Mustang was named after the famous P-51 Mustang fighter plane, so it's no surprise that Ford continued the theme with the performance-oriented Mach 1 option package. Representing the velocity of an object equal to the speed of sound, the term Mach 1 is synonymous with going fast.