Test compression ... confused

Hello, it is certainly the problem of the head, if the compression you have it correct, there is no problem unless you have doubts and prefer to change the rings.
My opinion is that you only repair the head only, how many miles or kilometers does the car have?

Thanks Dieseltech. It has 150,721km, looking well the route that the piston makes from PMI to PMS it is possible to see the space in the 1 ring that is 1 mm without variations (I think it is normal). There is now a cylinder with a pair zest from the bottom up, such as some ring, but only in that position. Well, if I had to change rings, I think I should rectify cylinders too, in which I should look.

If the cylinder is grated usually indicates that a ring is broken, the compression is ok so you have no problems, look a good way to know if you have rings problems is the following look at the head of the piston if on the shore it is clean as well as shin Blue smoke enchant especially in climbs, that is, when you exem you strong.

PS: The ral in the cylinder can be ocacacited by the piston pin too. luck

Friend how I answered you in the message the slack of the piston with the cylinder is large, and as I read there the measure between rings tip is also large since the rings tip measure must be maximum 0.35 mm APX.
Rayadura may be due to the same, wear and burning oil causes the rings to get more hard, by the simple fact that the remains of oil burned in the camera are housed in the slots of the rings.
The compression the same, when the oil enters the cylinder, it makes a hermetic closure between the piston, ring and cylinder, which will result in a high or normal compression.
Seeing the reference photo of the compressions, you clearly have a 10% compression difference which accuses wear in the cylinder and in rings.
Check the measures in the workshop manual ... Good luck friend. Anything you warn.