# How Many CC's To One Horsepower Unit?

On a smaller engine, typically used on lawn mowers and snow blowers, rough estimate is 34.5cc = 1 hp.  Example 342CC engine on a snowblower would approximately equate to a 10hp engine.
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"cc's" are cubic centimeters which are units of volume. A cube that is one inch along one edge has a volume of 16.4 cubic centimeters. A one liter bottle of water has a volume of 1000 cc.
"Horsepower" is a unit of work done per unit time. The two are not equivalent. An engine may be measured in cubic centimeters or liters which indicates the volume of the cylinders or the general "internal size" of the engine. All things being equal, the larger the engine, the more horsepower it can be expected to produce.
The complication to this is different engine designs of the same physical size may be able to produce more horsepower than others.
The primitive side valve gas engines using carburetors to mix the air and fuel found in inexpensive lawnmowers produce relatively few horsepower per cubic centimeter of size. Overhead valve engines are more powerful because they can be designed with higher compression. Overhead cam engines produce more power for their size than overhead valve designs because they can operate at higher rpms ( revolutions per minute). The use of superchargers or turbochargers allows a given engine size to be more powerful than an equivalent engine without the device because it rams more fuel-air mixture into the engine than it is able to draw in on its own without the device.
As a final example, in the 1980's Subaru produced an overhead valve 1800cc motor with a carburetor that produced about 71 Hp. This was followed by an overhead cam motor of the same size with a carburetor that produced 91 hp. Replacing the carburetor with electronic fuel injection on the same basic motor of the same size produced 97 hp. The addition of turbo charging to the motor of the same size produced 135 hp. By the 2000's Subaru was building an 1800 cc motor with dual overhead cams, multi-port fuel injection and turbocharging that exceeded 200 hp.
I hope this clarifies your question.
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15 to 17cc=1 hp
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If I have a one cylinder engine with 180 cc how much hp is that
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208cc's equals how much horse power?
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1hp=15-17cc
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342 cc=how much hp
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180 hp how many cc's
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Is not directly related. cc's are a measure of volume and horsepower is a measure of how much work can be accomplished over a given amount of time. Also depends on cam, fuel injection or carb, compression ratio, and a multitude of other things.
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CCs are engine size. Horsepower is [I]power[/I]. You can get a rough estimate of the power by multiplying the engine's size in cc by about 8 tenths of it's redline, dividing that by 56,634, then dividing that by 1.3. Considering that motorcycle engines of that size are normally put in cruisers, which often have a redline between 5 and 6,000 rpm, I estimate (with no guarantee) a horsepower rating between 97 and 117hp.
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87cc
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