5. Ford Mustang Mach I Concept
This car was introduced during the 1966 Detroit car show and immediately became one of the most interesting models even though it was still just a prototype. The Mach I was the first sporty and muscle Mustang released and it showcased not only the 1967 redesign and sexy Fastback lines but also a new name that will be used in 1969.
With a chopped roof, square headlights, Plexiglas side windows with racing-style cut-outs, cool wheels, and beautiful burgundy color, the Mach I was a muscle car Mustang at its finest and captured the imagination of car enthusiasts all around the globe. Even today, it is one great-looking car.