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A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The majority of automotive four-cylinder engines use a straight-four layout [1]: pp. 13–16 (with the exceptions of the flat-four engines produced by Subaru and Porsche) [2] and ...
The AMC straight-4 engine is a 2.5 L straight-four engine developed by American Motors Corporation (AMC) that was used in a variety of AMC, Jeep, and Dodge vehicles from 1984 through 2002. The 2.5 L I4 Jeep engine shared design elements and some internal components with the AMC 4.0 L I6 that was introduced for the 1987 model year.
Compared with a V4 engine or a flat-four engine, a straight-four engine only has one cylinder head, which reduces complexity and production cost. Displacement Petrol straight-four engines used in modern production cars typically have a displacement of 1.3–2.5 L (79–153 cu in) , but larger engines have been used in the past, for example the ...
The Chevrolet 2300 is a 2.3-liter straight-four engine produced by the Chevrolet division of General Motors for the 1971 to 1977 model years of the Chevrolet Vega and Chevrolet Monza. This engine was also offered in the 1973–74 Pontiac Astre (Canada only), the 1975–77 Pontiac Astre (United States and Canada), the Pontiac Sunbird for 1976 ...
Atlas is a name for a family of modern inline piston engines for trucks from General Motors, used in the GMT355 and GMT360 platforms. The series debuted in 2002 with the Oldsmobile Bravada, and is also used in the Buick Rainier, the Chevrolet TrailBlazer and Colorado, the GMC Envoy and Canyon, the Hummer H3, Isuzu Ascender and i-370, and the Saab 9-7X.
A straight engine is easier to build than an equivalent flat engine or V engine, as it uses one cylinder head rather than two. Inline engines are also narrower than flat engines or V engines; however, they are longer and can be taller. The engine balance characteristics of a straight engine depend on the number of cylinders and the firing interval.
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Most engines with four or less cylinders use a straight engine layout, and most engines with eight cylinders or more use a V engine layout. However, there are various exceptions to this, such as the straight-eight engines used by various luxury cars from 1919-1954, [ 1 ] [ 2 ] [ 3 ] V4 engines used by some marine outboard motors, V-twin and ...