I have a '93 XJ 40 with 4.0Ltr engine.
It is a typical Jaguar of that year....Electrical nightmares of all types and with only 70K miles it has no oil pressure at idle
I have access to a rolled mid-90's XJR. My question is can I transplant the following into my XJ40....Engine/Transmission; Front/Rear Brakes. I'd like to improve the suspension but do not know my options.
I would also like to put beefier wheels/tires on the XJ40....Any suggestions....Non Jaguar is OK....Many Thanks, David

 

Hello,
If you mean handling by improving the suspension I think XJR parts or TWR should be way to go . Latter is very scarce though . You can put BMW rims , they don't look creepy at all . Recently, there was a black car with BMW wheels on it and it looked dandier than I thought it would be .
Whatever you do , don't put truck wheels on it , I mean 20s and higher , they ruin the car as well as ride quality .

Bilstein and Koni makes suspension parts for Jaguars as well
Your car is already too low so you can easily scrape your bottom if you go too far
You should be able to put later models' parts but price is gonna sky rocket and buying a used XJ12 should be cheaper than all things involved