How to read compression test results?

[gideup]

Just got my first antique 1965 2 +2 mustang with a 289 motor. Did a compression test to see where things are.

Low was 130, high was 145, with average of 134.5 over all eight cylinders.
Not sure if this is OK, so-so, or acceptable.
any thoughts from you restomoders out there?

 

[Ronstang]

It isn't terrible, but it isn't great. Some people say that all cylinders need to be within 10%, which your's barely is, and some say 5%. If it runs ok then let it go until you have the time and $$$ to do a quality rebuild.

 

[akd67]

It isnt the #s but how consistant they are. 10% of each other is what you are looking for.I checked mine pulling one plug at a time (I now know the correct way) and got close to 140 in all but one, which was 0. Push rod was bent bad.Is yours running ok?

 

[gideup]

it starts right up, I put new plugs in today. It runs kind of rough, could be that it needs new wires. If youjump on it, wants to stall. The gas is old too. The point gap is right on, but the carb hookup is kind of rigged. I have not had a chance to check the timing.