What is the typical gasoline engine compression pressure?

Typical gasoline engine compression pressure ranges from about 120 to 200 psi (pounds per square inch), depending on the engine's design and its state of tune. Higher-performance engines may achieve pressures above 200 psi, while older or lower-compression engines might be on the lower end of the scale. Factors such as engine displacement, combustion chamber design, and compression ratio all influence these values. Regular maintenance can also affect compression pressure, impacting engine performance.