Fastback

[8] The term "fastback" is not interchangeable with "liftback"; the former describes the car's shape, and the latter refers to a roof-hinged tailgate that lifts upwards for storage area access.

More specifically, the Road & Track Illustrated Automotive Dictionary defines the fastback as A closed body style, usually a coupe but sometimes a sedan, with a roof sloped gradually in an unbroken line from the windshield to the rear edge of the car.

[9] In the case of the Ford Mustang, the term "fastback" is used to differentiate against the coupé notchback body style,[10][11] which has a steeper rear window followed by a horizontal trunk lid.

[12] Such designs, which were ahead of their time when exhibited during the early 1930s, included a droplet-like streamlining of the car's rear, a configuration similar to what would become known as the "fastback" 25 years later.

Early examples of fastback cars include the 1929 Auburn Cabin Speedster, 1933 Cadillac V-16 Aerodynamic Coupe, 1935 Stout Scarab,[15] 1933 Packard 1106 Twelve Aero Sport Coupe,[16] Bugatti Type 57 Atlantic, Tatra 87, Porsche 356, Saab 92/96, Standard Vanguard, GAZ-M20 Pobeda, and Bentley Continental R-Type.

[19] In Australia, fastbacks (known as "slopers") were introduced in 1935, first designed by General Motors' Holden as one of the available bodies on Oldsmobile, Chevrolet, and Pontiac chassis.

[27][28][29] In North America, the numerous marketing terms for the fastback body style included "aerosedan", "club coupe", "sedanette" and "torpedo back".