I just recently had one done on my car and i was wondering what does the 7.5 mean? and is it good or bad? Ty.

I think an rx8 compression test consists of 2 series of 3 numbers. One compression value per face of the rotor per rotor.

xxx, xxx, xxx
xxx, xxx, xxx

I just recently had one done on my car (#) and i was wondering what does the 7.5 mean? and is it good or bad? Ty.It is based on R.P.M. and must be done with the engine at operating temp. That said, 7.5,7.5,7.5 @ 250 rpm is fine. Scott