After many months of checking and double checking the ride height of many coupes, I came to the conclusion that mine was too damn high at the rear, by about 33mm. ( Picture of car below with backside too high)
I suspected that sometime in its life, the rear struts (KONI) were changed over, but I believe that HPE ones were used instead of coupe ones.
If some one could confirm this with the pictures of the struts next to measuring tape below, that would be a great help.
I have since lowered it by about a coil and found that the ride height is now correct to other coupes I have measured with a standing tape. of Course this measurement can be a bit misleading depending on your fuel load and how many dead bodies you have in the trunk
Any advice is helpful