Straight-5
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The straight-5 is an internal combustion engine with five cylinders aligned in one row, sharing a single engine block and crank case. This configuration is a compromise between the smaller straight-4 and the larger straight-6.
Straight-5 engines have been used infrequently but steadily. In recent years they have become increasingly popular. They've been seen on Audis and on some Diesel-powered Mercedes-Benz models, as well as on the Acura Vigor. Recently, General Motors launched a popular straight-5 engine for its truck line as part of its Atlas family that also includes 4- and 6-cylinder versions. In addition, many late-model Volvos make use of straight-5 engines. Volkswagen has also developed a straight-five engine which will be used in the next generation Jetta and Golf.
Automobile use
The smallest production straight-5 was found on the 1981 Audi 100, with 1921 cc of displacement. The Toyota 1PZ Diesel is the size champ at 3469 cc, though the aforementioned GM Atlas is close at 3464 cc.
Motorcycle use
The smallest straight-5 was found on the Racing motorcycle Honda 125/5.