This car is a bargain in the used marketplace, with excellent performance and reliability. But there are a few weak areas. Make sure the plastic timing gear has been replaced with factory metal components. And, that the plastic water pump has been replaced with the factory metal unit.
Do not buy an XJ that's been through an overheat.
The ZF automatic is "sealed for life" and prone to failure over 100K miles unless thoroughly cleaned out.
Buy one of these cars only if you know of a non-dealer Jaguar speciality shop that can service it. (Check with your local Jaguar club.)
If you are looking for a car that personifies elegance and style with the power and performance of a sports car, then the 2001 XJR is your ride. With almost 400 horses on my supercharged Jag, it's so much fun watching upstart Mustangs and Maximas recede in my rear view.