Compression checks don't really have much to do with compression ratio. It does a little, but compression ratio is a static measurement. Cylinder compression is a dynamic measurement. When your checking with a guage, your looking for consistency. The cylinders should all be within 10% of one another. Valve wear, ring wear, cam specs, cam timing, all have an impact on the cylinder compression but the compression ratio is still the same. As an engine gets worn the compression will decrease, but the ratio is the same. Look for the numbers to be similar, any dramatic difference is a sign of a problem. But 140 sounds good. Good luck.