Slant four or Slant-4 was a name given to several unrelated engines produced by different manufacturers. These were all
in-line four-cylinder engines with cylinders inclined from vertical. They include:
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Vauxhall Slant-4 engine
The Vauxhall Slant-4 (or Slant Four) is an inline-four engine, inline four-cylinder petrol automobile, car engine manufactured by Vauxhall Motors. Unveiled in 1966, it was one of the first production overhead camshaft designs to use a Timing bel ...
(a planned V8 version never materialized)
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Triumph Slant-4 engine
The Triumph slant-four is an inline four-cylinder petrol car engine developed by the Triumph Motor Company. It first appeared in 1968 in the Saab 99. The first Triumph model to use the engine did not appear until 1972. With an original capacity ...
(4-cylinder variant of
Triumph V8)
**
Saab B engine
The Saab B engine is an inline four-cylinder car petrol engine developed by Saab Automobile. A redesign of the Triumph slant-four engine, the B engine displaced 2.0 L and first appeared in 1972. The B engine was used in the Saab 99 and 900 m ...
(a version of the Triumph Slant-4 engine built by Saab with modifications)
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Saab H engine
The Saab H engine is a redesign of the Saab B engine, which in turn was based on the Triumph Slant-4 engine.
Despite the name it is not an H engine or horizontally opposed engine, but a slanted inline-4. The H engine was introduced in 1981 in th ...
(a redesigned Saab B engine built by Saab)
Other inline four-cylinder engines with a similar layout, but without the official name, include:
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Pontiac Trophy 4 engine
The Pontiac Trophy 4 engine (also called the ''Indianapolis 4'', or ''Indy 4'') is a inline four-cylinder engine produced by the Pontiac Motor Division of General Motors for model years 1961 through 1963. Created from one bank of Pontiac's pow ...
(4-cylinder variant of
Pontiac V8 engine
The Pontiac V8 engine is a family of overhead valve 90° V8 engines manufactured by the Pontiac Division of General Motors Corporation between 1955 and 1981. The engines feature a cast-iron block and head and two valves per cylinder. Engine bloc ...
)
* International Harvester Comanche 4 (4-cylinder variant of International Harvester Comanche V8)
*
Lotus 900 series
The Lotus 900 series is a family of internal combustion engines designed and built by Lotus Cars of United Kingdom. Successor to the Lotus-Ford Twin Cam, the 900 was the first complete engine developed by Lotus. The engine was built from 1972 t ...
(a planned production V8 never materialized, but did appear in the
Lotus Etna concept car)
*
Hillman Imp
The Hillman Imp is a small economy car that was made by the Rootes Group and its successor Chrysler Europe from 1963 until 1976. Revealed on 3 May 1963, after much advance publicity, it was the first British mass-produced car with the engine blo ...
engine
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Volvo Redblock Engine
The Volvo B21 is a slanted straight-four engine first used in the Volvo 200 series, meant to replace the B20. The B21 and all derived engines are often referred to as ''red block'' engines for the red paint applied to the block. The primary dif ...
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Piston engine configurations
Slant engines