I have never been satisfied with the ride of my 1995 XJS 2+2. Articles suggest it should be superior to an XJ 6, but I consider it inferior to my previous two Sovereigns.
My biggest concern is that the rear of the car seems to wallow and hit the
bump stops quite quickly. Carrying out the usual, rather unscientific, "bounce test" suggest the rear shock absorbers are serviceable. The ride height also appears normal.
Typically how long do the original factory fit shock absorbers last and, what have other users found as the best replacement?