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One imperial horsepower lifts 550 pounds (250 kg) by 1 foot (30 cm) in 1 second. Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower.
Engine displacement. One complete cycle of a four-cylinder, four-stroke engine. The volume displaced is marked in orange. Engine displacement is the measure of the cylinder volume swept by all of the pistons of a piston engine, excluding the combustion chambers. [1] It is commonly used as an expression of an engine's size, and by extension as ...
Chrysler Hemi engine. The LA engine is a family of overhead-valve small-block 90° V-configured gasoline engines built by Chrysler Corporation between 1964 and 2003. Primarily V8s, the line includes a single V6 and V10, both derivations of its Magnum series introduced in 1992. A replacement of the Chrysler A engine, they were factory-installed ...
And for a brief time in the early 1980s, a version with a smaller bore diameter that displaced 255 cubic inches (4.2 L) was produced as Ford struggled with emissions and fuel economy. In response to the Chevrolet Camaro's success in the SCCA Trans-Am Series, Ford engineers developed a new racing engine from the small block. The first attempt ...
It delivered 375 hp (280 kW) at 4400 rpm and a massive 525 lb⋅ft (712 N⋅m) torque at just 3000 rpm. The new engine was about 80 lb (36 kg) heavier than its predecessor. It was used through 1974. It was designed with potential for a 500-cubic-inch (8.2 L) displacement.
Output was 155 hp (116 kW) in the Mustang, and the 250 became the base engine in 1971. The Ford Granada and Mercury Monarch offered the 250 inline-six for the 1975–1980 model years, when it was replaced by the 200 inline-six. Power was re-evaluated at 98 hp (73 kW) for 1972 (because of power rating changes) and 88 hp (66 kW) the next year.
The International Harvester Corporation 304-cubic-inch (5.0 L) SV "Comanche" V8 engines are sometimes mistaken for the AMC 304, however, the IHC V8 engine family has no relation to the AMC V8 and was in fact first produced in 1959, 11 years prior to the AMC designed 304. The similarity in displacement is purely a coincidence.
A high-performance 327 cu in (5.4 L) variant followed, turning out as much as 375 hp (280 kW) (SAE gross power, not SAE net power or the current SAE certified power values) and raising horsepower per cubic inch to 1.15 hp (0.86 kW). From 1954 to 1974, the small-block engine was known as the "Turbo-Fire" or "High Torque" V8.