Is there a difference in ride height between the XJ8, XJ8 Sport, and XJR? Seems like my XJ8 Sport rides lower than a standard XJ8.

 

I don't think there should be for the X308 series. I'm pretty sure the "sport tuned suspension" comprised of stiffer valved shocks and a different rear roll bar which neither should affect ride height. I think the XJR-100's might have used a slightly shorter spring.