Displacement

The engine displacement is the sum of the working volumes of each cylinder and is generally expressed in milliliters (cc). The working volume of the cylinder refers to the gas volume swept by the piston from top dead center to bottom dead center. It is also called the single cylinder displacement. It depends on the bore diameter and piston stroke. Engine displacement is one of the most important structural parameters. It is more representative of the size of the engine than the bore diameter and number of cylinders. Many engine indicators are closely related to displacement.