Compression/psi on old David Bradley saws?

[bloom]

Did a compression test on a non-running David Bradley I set aside to restore and it showed around 80 psi. Thought this was low, did compression tests on 3 other old junker DB's lying around and they were all about the same, between 70-85 psi. Dropped a bit of gas mix in the cylinder of the saw in question, gave it a crank and it fired and seemed to have the sound of a saw that might have some life left in it. QUESTION: Did older saws like this have a lower compression standard? Is this normal? Thanks

 

[galde]

Compression at cranking speed should be approx. 60 psi for 3.1 c.i.d., 70 for 4.7, 80 for 5.1, 90 for 5.8, 110 for 8.2.