I just got dome watching this video on youtube:
And at 6:02 in the video he talks about what mid-size Jaguar NOT to buy and I was VERY surprised and unhappy to discover he was talking about XJ40 cars.
Just prior to that he says the mid-size Jaguar to buy is the 1998 -2003 XJ8
He says that Jaguar ruined the styling of the XJ40 cars and that the cars are terrible to diagnose because they have no trouble codes to assist with diagnosing EFI problems.
And this is why he does not recommend them.
I was gnashing my teeth during this so I just had to come over here and let out my frustration.