Bore, when used in the context of piston engines, is a measurement of the diameter of the holes bored into the engine block for use as cylinders. The ratio of stroke to bore is a major factor in defining the characteristics of an engine. Generally, bigger bore yields fast-revving engines with low rotational mass and therefore higher rev limits with later torque peaks and overall higher top end power at the expense of torque throughout the operating range. Smaller bore with longer stroke tends to make more torquey engines with lower rev-limits, with the increased rotational mass leading to slower revving. Components of a typical, four stroke cycle, DOHC piston engine. ... Look up cylinder in Wiktionary, the free dictionary. ... A stroke is a single action of certain engines. ... The principle of inertia is one of the fundamental laws of classical physics which are used to describe the motion of matter and how it is affected by applied forces. ... A Rev limiter is a device fitted to a petrol internal combustion engine to restrict its maximum rotational speed. ... It has been suggested that this article or section be merged with Moment (physics). ... Look up Power in Wiktionary, the free dictionary. ...

Engine displacement is calculated by: One complete cycle of a four cylinder, four stroke engine. ...