Considering an ECU remap for your Jaguar XJ 3.0D 300hp? A Stage 1 remap can take this 2009 -> diesel engine from 300 BHP to 330 BHP and from 700 Nm to 780 Nm of torque (turbocharged). This engine scores 6/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Jaguar XJ can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Jaguar XJ 3.0D 300hp is a 3.0L turbocharged diesel engine producing 300 BHP and 700 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 330 BHP and 780 Nm — a gain of around 30 BHP (10%) and 80 Nm (11%).
This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 8-speed automatic (where fitted). at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: High tuned torque: check transmission torque capacity and service history.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.
Fuel economy note: possible improvement with conservative driving.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 2.0 SC Turbo 240hp | 240 → 270 | +30 | 340 → 440 | +100 | Good (7/10) |
| 3.0D 275hp | 275 → 325 | +50 | 600 → 675 | +75 | Good (6.5/10) |
| 3.0 V6 SC Turbo 340hp | 340 → 390 | +50 | 450 → 500 | +50 | Good (6/10) |
| 5.0 V8 385hp | 385 → 405 | +20 | 515 → 540 | +25 | Limited (3.5/10) |
| 5.0 V8 Supercharged 510hp | 510 → 560 | +50 | 625 → 700 | +75 | Good (6/10) |
| R 5.0 V8 Supercharged 550hp | 550 → 570 | +20 | 680 → 720 | +40 | Moderate (4.5/10) |
| R575 5.0 V8 Supercharged 575hp | 575 → 600 | +25 | 700 → 750 | +50 | Moderate (5/10) |
Get a personalised remap quote for your Jaguar XJ. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
