How many pounds compression for the 1941 Plymouth 215 motor have?

The 1941 Plymouth 215 cubic inch motor typically has a compression ratio of around 6.5:1. The engine's compression pressure can vary based on factors such as engine condition and maintenance, but it generally falls within the range of 90 to 110 pounds per square inch (psi) when tested with a compression gauge. For optimal performance, it's important to ensure that all cylinders are within a similar range.