Triumph slant-four engine
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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 of 1.7 L, displacement grew over time to 2.0 L. Triumph production ended in 1981.
Triumph slant-four engine
Cross-section of Dolomite Sprint cylinder head, highlighting the single cam operating both inlet and exhaust.
Triumph Dolomite Sprint engine
Straight-four engine
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A straight-four engine is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft.
Diagram of a DOHC straight-four engine
1989-2006 Ford I4 DOHC engine with the cylinder head removed
2006-2009 Nissan M9R diesel engine
1908–1941 Ford Model T engine