Engine displacement
![One complete cycle of a four-cylinder, four-stroke engine. The volume displaced is marked in orange.](/Images/godic/202502/03/Displacement5821.gif")
Engine displacement is the volume swept by all the pistons inside the cylinders of a reciprocating engine in a single movement from top dead centre (TDC) to bottom dead centre (BDC). It is commonly specified in cubic centimetres (cc or cm), litres (l), or (mainly in North America) cubic inches (CID). Engine displacement does not include the total volume of the combustion chamber.