Engine displacement, often expressed in cubic centimeters (cc) or liters (L), indicates the total volume swept by all the pistons inside the cylinders of an engine during a single complete stroke. Determining this volume requires specific engine measurements: the bore (cylinder diameter) and the stroke (distance the piston travels within the cylinder). The calculation relies on the formula: Displacement = (/4) bore stroke number of cylinders. For instance, an engine with a bore of 86mm, a stroke of 86mm, and four cylinders would have a displacement calculated as (/4) 86 86 4, resulting in approximately 1998cc or 2.0L.
Knowing an engine’s swept volume provides a standardized measure of its potential power output. This metric is crucial for comparing the performance capabilities of different engines and is frequently used for vehicle classification and taxation purposes. Historically, displacement has been a primary factor influencing engine performance, with larger volumes generally associated with greater power and torque. Understanding this relationship allows for informed decisions regarding engine selection and modification.
