How is engine compression typically measured?

Engine compression is typically measured in pounds per square inch (psi) or kilograms per square centimeter (kg/cm²). This measurement indicates the pressure that is generated within the engine's cylinders during the combustion process, which is critical for assessing engine performance and efficiency.

High compression forces higher temperatures and pressures, leading to more power from the engine. Measuring compression accurately helps diagnose issues such as worn piston rings or cylinder head problems, as low compression can indicate that the engine is not sealing properly. Therefore, understanding engine compression and its measurement is essential for evaluating engine health and performance.