What displacement does not tell you
Displacement is useful for comparing engine size, but power depends on airflow, compression, RPM, forced induction, tuning and measurement method.
Example
A 4-cylinder engine with 86 mm bore and 86 mm stroke has about 1,998 cc of displacement, often described as a 2.0-liter engine.
Common mistakes
Use bore and stroke in the same unit. Also remember that advertised engine size may be rounded for marketing or naming conventions.
Limitations
This calculator estimates geometric swept volume only. It does not estimate horsepower, torque, compression ratio, emissions class or engine condition.
Last reviewed: 2026-05-17