HORSE-POWER AND LITRES
ENGINE CAPACITY COMPARISON Very often- the question is asked by motorists—what fraction of horse- ; power does the litre equal? A litre is 1,000 c.c. or roughly just over seven horse-power. The term “litre” as applied to many j European sports cars is really a measurement of engine capacity and canj not be expressed in terms of horse- ; power where a multi-cylinder engine I is concerned. j In connection with motor cycle enj gines 100 c.e. (i.e., one-tenth of a litre) is sometimes regarded as representing ! 1 h.p., as. for example, a 175 c.c. engine is designated 13 h.p. A car engine of, sa y» 10 h.p., is sometimes termed 1 litre, a 15 h.p. engine 11 litres, and a 20 h.p. 2 litres and so on. CUBIC CAPACITY A good way of calculating the cubic i capacity of an engine is to obtain the diameter of one of the cylinders in centimetres (there are 10 mm. in a ! centimetre), square it, multiply by 7554, which is a constant, and multiI ply the result by the length of the i stroke (also in centimetres). This is for a single-cylinder, so that for a multi-cylinder engine you would have to multiply by the number of cjdinders.
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Sun (Auckland), Volume II, Issue 534, 11 December 1928, Page 9
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207HORSE-POWER AND LITRES Sun (Auckland), Volume II, Issue 534, 11 December 1928, Page 9
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