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In line with the IDI diesel, the Power Stroke was offered in three-quarter-ton and larger versions of the Ford F-Series and Econoline product ranges. The Power Stroke is an electronically controlled, direct injection engine with a 4.11 in × 4.18 in (104.4 mm × 106.2 mm) bore and stroke creating a displacement of 444 cu in (7.3 L).
Introduced for the 1983 model year, the 6.9 L diesel was the first to be offered in Ford light-duty pickups, available in the F-250 HD and F-350. Although GM pickups already had offered a diesel engine in the C10 starting in 1978 (5.7 L Oldsmobile), and across the range in 1982 (6.2 L Detroit), those engines were intended for efficiency over power.
Power Stroke may refer to: In motoring: Power stroke (engine), the stroke of a cyclic motor which generates force; Power Stroke, a family of Ford diesel engines; Other: Power stroke (baseball), a batter who hits for extra bases; Power stroke (biology), the molecular interactions of muscle contraction; Power stroke (swimming), a propulsion kick