Jaguar S-Type 4.2 V8 Supercharged
ECU Remapping
Jaguar S-Type 4.2 V8 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 S-Type 4.2 V8 Supercharged: standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+45 bhp · +11%- Standard400 bhp
- Remapped445 bhp
Torque
+105 Nm · +19%- Standard550 Nm
- Remapped655 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
ECU remapping for the Jaguar S-Type 4.2 V8 Supercharged takes it from 400 to 445 bhp and from 550 to 655 Nm in our stage 1 figures: +45 bhp (11%) and +105 Nm (19%).
The figures above are estimates for a standard, well-maintained Jaguar S-type petrol; they are not a guarantee of any particular result.
Jaguar S-Type 4.2 V8 Supercharged remap figures
- Fuel: Petrol
- Standard power: 400 bhp, remapped: 445 bhp (+45 bhp, +11%)
- Standard torque: 550 Nm, remapped: 655 Nm (+105 Nm, +19%)
- Service: stage 1 ECU remap, fully dyno tested
How ECU remapping works on a petrol Jaguar S-type
Petrol engines are remapped by refining fuelling, ignition timing and, on turbocharged engines, boost control. Done carefully this releases performance the manufacturer left in reserve, giving sharper throttle response and a stronger top end.
How the Jaguar S-Type 4.2 V8 Supercharged compares
Ranked by power gain against the other petrol S-type engines (5 in total), the 4.2 V8 Supercharged is 1st, 12 bhp above the S-type petrol average of 33 bhp.
Across our whole catalogue the average petrol remap adds 27 bhp and 51 Nm, so this engine's 45 bhp and 105 Nm sits at or above that benchmark.
Remapping your Jaguar S-type across the UK
Remap Experts is a UK network of local remapping sites. Use Find a Local Tuner to reach your nearest site and get an exact quote.
Each remap is dyno tested before it is signed off, and is protected by a 30 day money back guarantee and a lifetime software warranty. Ask for a quote online or by phone.

Get a quote for your Jaguar S-Type 4.2 V8 Supercharged
Send your details and a specialist will confirm what is possible for your engine.
Included
What we can do for your Jaguar S-type
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.
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