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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 an indicator of the power (through mean effective pressure and rotational speed ) an engine might be capable of producing ...
Technical publications by industry publishers and American automakers often give engine displacements in cubic inches as well as cubic centimeters (which are equivalent to milliliters), or liters. [ 65 ] [ 66 ] For example, the specifications for the Dodge SRT-8 6.1 L Hemi state the displacement as 370 cubic inches (6,100 cm 3 ).
A 1964 Rambler American with a 195.6 OHV engine. American Motors' first straight-six engine was the 196 cubic inch (195.6 cu in (3.2 L)) six produced from 1952 through 1965, initially as a flathead (L-head) side-valve, and later an overhead valve (OHV) version.
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity.
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
The smaller engine, dubbed 3.2 litre, featured a 79.30 mm (3.122 in) stroke and a swept volume of 3,157 cubic centimetres (193 cu in). The larger engine, dubbed 3.9 litre, shared the 99.31 mm (3.910 in) stroke of the previous 4.1 litre engine for a swept volume of 3,949 cubic centimetres (241 cu in).
The 2.0 litre version was a narrower-bore version of the original 2.3 liter "Lima" four. Bore and stroke are 89.3 and 79.4 mm (3.52 and 3.13 in), respectively, for an overall displacement of 2.0 L; 121.4 cu in (1,990 cc). This engine was installed in the 1983–1988 Ford Rangers and in some Argentinian Ford Taunus. Applications
The auto industry now uses liters for this purpose, while reciprocating engines used in commercial aircraft often have model numbers based on the cubic inch displacement. The fifth generation Ford Mustang has a Boss 302 version that reflects this heritage - with a five-liter (302 cubic inch) engine similar to the original Boss.