[ossiblue]

Those numbers, of course, indicate the psi in each cylinder and the ones you posted look good. The main thing with compression numbers is the difference between cylinders--typically should no more than a 10% difference, max, between cylinders.

This is different than leak down numbers which is probably a better indication of engine soundness than a plain compression test. Leak down involves pressurizing each cylinder with air and measuring the percentage of air lost. The results are expressed in percentages. These numbers will give clues to valves, valve guides, piston ring conditions and general health of the engine. You should have this test done by a knowledgable Porsche mechanic.

As far as having the test done 10,000 miles ago, you shouldn't see much change but remember a new test even on the same day as the previous test might produce different absolute numbers--no biggie as long as the relative differences are within specs, and the absolute numbers are not way different than the first test.