Fastback
1935 Stout Scarab
1949 Cadillac Series 62 rear
1950s Warszawa M20
1956 Porsche 356A
1967 AMC Marlin, a full-size 2-door fastback
1968 Ford Mustang, a pony car fastback
1978 Citroën CX 4-door fastback sedan
2006 Mercedes-Benz CLS55 AMG
Unlike the Tesla Model S 5-door liftback, the Tesla Model 3 seen here is a 4-door fastback sedan (i.e. with a separate trunk)
A fastback is an automotive styling feature, defined by the rear of the car having a single slope from the roof to the tail.
Some models, such as the Ford Mustang, have been marketed explicitly as fastbacks, often to differentiate them from other body styles (e.g. coupé models) in the same model range.