20-01-16, 08:29 PM
Don't worry too much about the absolute values being a long way off-spec... chances are the tester adaptor doesn't fit as deep into the plug hole and the extra space reduces the apparent compression. The differences between them is more important.
Valve clearances are probably the next thing to check since it looks like cylinder 3 is in trouble. If the leakage and compression results for cylinder 4 are inconsistent that may be due to a sticky valve.