180 degrees.

Straight-three engines can offer improved fuel efficiency due to their smaller size, lower mass, and reduced internal friction from having fewer moving parts. For a given displacement, each cylinder is also larger than in a straight-four engine, allowing larger valves and improved airflow.

Usage in cars

One of the first 3 cylinder cars include the 3 cylinder 15hp Rolls Royce produced in 1905 . The 1956-1960 Saab 93 saw the introduction of Saab's 750 cc two-stroke engine,

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