The AMC AMX is a two-seat GT-style muscle car produced by American Motors Corporation from 1968 through 1970. As one of just two American-built two-seaters, the AMX was in direct competition with the one-inch (2.5 cm) longer wheelbase Chevrolet Corvette, for substantially less money. It was based on the new-for-1968 Javelin, but with a shorter wheelbase and deletion of the rear seat. In addition, the AMX's rear quarter windows remained fixed, making it a coupe, while the Javelin was a true two-door hardtop.

Muscle car is a description according to the online Merriam-Webster Dictionary in 2022 that came to use in 1966 for "a group of American-made two-door sports coupes with powerful engines designed for high-performance driving." The online Britannica Dictionary described these in 2022 as "an American-made two-door sports car with a powerful engine."