What unit is commonly used to measure engine size in cubic centimeters?

The measurement of engine size in cubic centimeters (cc) is widely used, particularly for motorcycles, small engines, and certain automotive applications. This unit provides a practical way to express the engine's displacement, which refers to the total volume of all the cylinders within the engine. In terms of performance, a larger displacement generally indicates that an engine can intake more air and fuel, leading to more power.

Cubic inches and liters are also units of measurement for engine size, but they are less frequently employed in specific contexts. For example, cubic inches may be more common in American muscle cars, while liters are often used in metrics for larger automotive engines. Horsepower, on the other hand, measures the power output of an engine, rather than its size or displacement. Therefore, cubic centimeters is the correct answer because it directly refers to the volume measurement of the engine's cylinders.