Jaguar XJR Supercharged
ECU Remapping
Jaguar XJR Supercharged. Standard and remapped figures for this exact engine.

- Fully dyno tested remaps
- 30 day money back guarantee
- Lifetime software warranty
- UK-wide local network
Remap stats
Jaguar XJR Supercharged: standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+30 bhp · +8%- Standard400 bhp
- Remapped430 bhp
Torque
+65 Nm · +12%- Standard550 Nm
- Remapped615 Nm
Tuning figures are indicative estimates, not guaranteed results. Actual results depend on the condition of the vehicle.
Prices from £130
Fully dyno tested | 30 day money back guarantee | Lifetime software warranty
What does a remap do for the Jaguar XJR Supercharged? Our figures show power up from 400 to 430 bhp (+8%) and torque up from 550 to 615 Nm (+12%), a stage 1 result you can book across the UK.
Treat the numbers as a guide: they are stage 1 estimates for a petrol Jaguar XJ in sound condition, and individual cars differ.
Jaguar XJR Supercharged power and torque after remapping
- Fuel: Petrol
- Standard power: 400 bhp, remapped: 430 bhp (+30 bhp, +8%)
- Standard torque: 550 Nm, remapped: 615 Nm (+65 Nm, +12%)
- Service: stage 1 ECU remap, fully dyno tested
What a remap does for a petrol Jaguar XJ
On a petrol car the ECU controls fuelling, spark timing and any turbo boost. A remap re-calibrates those maps within safe limits, so the car responds more eagerly and pulls harder through the rev range.
Book performance tuning for your Jaguar XJ
Our network covers the whole of the UK through local Remap Experts sites. Find your area to get a quote from a specialist near you.
Every remap is fully dyno tested and comes with a 30 day money back guarantee and a lifetime software warranty. Call 0800 779 7864 for a quote.

Get a quote for your Jaguar XJR Supercharged
Send your registration and we will confirm the exact remap, the price and the next available slot.
Included
What we can do for your Jaguar XJ
Stage 1 ECU remap
Add power and torque and improve driveability. Software only, tailored to your engine.
ECU repair and testing
Is your engine control unit playing up? We can arrange testing and repair, and source replacement ECUs.
DPF and EGR fault repair
Persistent DPF or EGR errors diagnosed and resolved in accordance with all current road-legal standards.
Engine carbon cleaning
Fault finding and carbon cleaning for the inside of your engine, typically completed in a couple of hours.
Same model
Other XJ engines
From quote to remapped in four steps
No jargon and no pressure. Here is exactly what happens.
- 01
Find your vehicle
Choose your make, model and engine to see the standard and remapped power and torque for your car.
- 02
Request a quote
Send your details and we contact you by SMS or call back with a quote. No obligation.
- 03
Book with your local site
Your local Remap Experts site arranges the remap and answers any questions about your car.
- 04
Remapped and dyno tested
Your remap is fully dyno tested, with a 30 day money back guarantee and a lifetime software warranty.
Everything you need to know
Plain-English guides to how remapping works, what it does and what to check first.
- 6 min read
What is ECU remapping?
The engine control unit, what a remap changes, and who it suits.
Read guide - 5 min read
The benefits of ECU remapping
More torque, better driveability and the potential for better economy.
Read guide - 6 min read
How ECU remapping works, step by step
From reading the original software to the dyno test.
Read guide