This re-naming trend continues with Audi and BMW inventing additional euphemisms to describe their hatchback vehicles, the Sportback (Audi) and Gran Turismo/Gran Coupe (BMW). The Tesla Model S is a 5 door fastback hatchback, but the manufacturer refers to it as a sedan.
Notchback (three box) vs. Fastback (two box) hatchbacks
The term "fastback" is not interchangeable with "liftback", since a fastback can have a fixed rear window rather than a hatch that opens. A fastback is a car that has an uninterrupted slope from the roof to the rear bumper; 
Some feel the slope of the rear window is a key determinant in the term Liftback, in which the rear cargo door, or hatch, is horizontally angled. As a result, the hatch is lifted more upwards than backwards to open, a lifting action.
The third box may be non-existent (Nissan Primera P12), very short or vestigial (1985 Toyota Celica liftback) or long enough for the vehicle to be confused with a conventional sedan which may be offered alongside it (Mazda 6 GG1, Opel Vectra C). While the majority of today's liftbacks feature smooth, flowing lines, making it difficult to tell where one "box" ends and another starts, the same applies to sedans, which makes the two body styles even more difficult to tell apart at first glance.
Fastback hatchbacks called Liftback were the mainstay of manufacturers' D-segment offerings in Europe in the 1990s to late 2000s, having become popular in the 1980s. It was common for manufacturers to offer the same D-segment model in three different body styles: a 4-door sedan, a 5-door hatchback, and a 5-door station wagon. Such models included the Ford Mondeo, the Mazda 626 and 6, the Nissan Primera, the Opel Vectra and Insignia, and the Toyota Carina and Avensis. There were also models in this market segment available only as a 5-door hatchback or a 4-door sedan, and models available only as a 5-door liftback or a 5-door station wagon. Often, the liftback and the sedan shared the same wheelbase and the same overall length, and the full rear overhang length of a conventional sedan trunk was retained on the five-door liftback version of the car.
The term was used for marketing purposes, among others, by Toyota, for example, to distinguish between two 5-door versions of the Corolla E90 sold in Europe, one of which was a conventional 5-door hatchback with a nearly vertical rear hatch while the other one was a 5-door liftback.
Audi, BMW and Mercedes-Benz were not part of this trend in the 1990s, as they did not offer their D-segment and executive cars as 5-door Liftbacks back then. However, starting around the year 2009, Audi and BMW started to sell Liftbacks, but invented new euphemisms, referring to them as Sportback (Audi) or Gran Turismo/Gran Coupe (BMW). Interestingly, this occurred not long after some other manufacturers started to retire D-segment Liftbacks from their European lineup.
The second-generation Skoda Superb, produced from 2008-2015, is a car that functions both as a hatchback and a sedan. It features a "Twindoor" trunk lid that can be opened using hinges located below the rear glass, or together with the rear glass using hinges at the roof.
- Jim Fets (3 December 2010). "Collectible Classic: 1976-1977 Toyota Celica GT Liftback". Automobile Magazine (U.S.). Retrieved 7 September 2020.
- Alex Sobran (15 May 2017). "This Toyota Celica Liftback GT Beautifully Couples Japanese And American Design". Petrolicious (U.S.). Retrieved 7 September 2020.
- Jeff Koch (1 January 2016). "1971-'77 Toyota Celica". Hemmings Motor News (U.S.). Retrieved 7 September 2020.
- Flammang, James M. (1990). Standard Catalog of American Cars, 1976-1986. Krause Publications. p. viii. ISBN 9780873411332. Retrieved 1 March 2016.
- "fastback". Merriam-Webster Online Dictionary. Retrieved 1 March 2016.
- "fastback". The Oxford Pocket Dictionary of Current English. Retrieved 1 March 2016.
- Jaza, Reza N. (2008). Vehicle dynamics: theory and applications. Springer-Verlag. pp. 30–31. ISBN 978-0-387-74243-4. Retrieved 3 March 2014.
A hatchback car is called a liftback when the opening area is very sloped and is lifted up to open.
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