Is the statement true: Compression ratios tell us the horsepower of an engine?

The statement that compression ratios tell us the horsepower of an engine is false. Compression ratio is an important parameter in an engine's design and performance, but it does not directly indicate the horsepower produced by an engine. The compression ratio refers to the ratio of the volume of the cylinder when the piston is at the bottom of its stroke to the volume of the cylinder when the piston is at the top of its stroke.

While higher compression ratios can lead to increased thermal efficiency and potentially more power, they do not alone determine the horsepower. Horsepower is influenced by various factors, including engine design, fuel type, air-fuel mixture, and engine tuning. Therefore, while there may be a relationship between compression ratios and horsepower, it is not a direct measure, making the statement incorrect.