Tuning guide for the Jaguar XK8
Our guide will make your XK8 much better and more fun to drive!
Available in standard form with power of upto 400bhp (depending on the year), so this goes to show the tuning potential of the XK8. From this you can increase the power from anywhere between 440bhp to 680bhp and this would take a lot more than just bolting on a massive exhaust and adding a go faster stripe.
For serious power hikes like this you would need to look at rebores, porting and polishing and add into the mix a hefty dose of forced induction.
The Car Tuning Guide suggest that if you have a lower powered version you should do an engine swap with a ’400bhp XK8 Convertibles’. Already a popular choice for tuning up, especially the more powerful XK8sThe most frequent modification we see on the XK8 include sports exhausts, air intakes or induction kits and a fuel pressure boost valve.
The Car Tuning Guide recommend that on the XK8s , you get a fast road cam. Internal engine modifications that should be high up on your list would be polishing and porting the head.
The most powerful XK8 Convertible in our database offers 400 bhp. From this you can increase the power from anywhere between 440 bhp to 680bhp with mods we have outlined above.
Forced induction XK8s respond exceptionally well to tuning mods especially remaps, also add an intercooler to your mod list. The top XK8 offers a base power level of 400 bhp. When setup for motorports we can expect to see almost mythical power figures approaching 520 bhp to 760 bhp! High on your list of mods for your XK8 should be handling improvements. Although lowering improves handling you should stick to a drop of 35mm.
We will have more detailed XK8 modification guides in the near future. Please check the site regularly for updates.
Here are some motoring links who provide some excellent resources on all aspects of car tuning and modifications:
Car Tuning Tips Forum for general car tuning Q&A with make specific categories.
Car Tuning Guide Good common sense online car tuning guide.




