Considering an ECU remap for your Jaguar S Type 4.2 V8 300hp? A Stage 1 remap can take this All petrol engine from 300 BHP to 315 BHP and from 420 Nm to 440 Nm of torque (naturally aspirated). This engine scores 3/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Jaguar S Type can achieve.
The Jaguar S Type 4.2 V8 300hp is a 4.2L naturally aspirated petrol engine producing 300 BHP and 420 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 315 BHP and 440 Nm — a gain of around 15 BHP (5%) and 20 Nm (5%).
This engine has low remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, 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)..
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
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 |
|---|---|---|---|---|---|
| 2.2D 155hp | 155 → 185 | +30 |
| 360 → 440 |
| +80 |
| Good (7.5/10) |
| 2.5 V6 201hp | 201 → 215 | +14 | 250 → 270 | +20 | Moderate (4/10) |
| 2.7D 207hp | 207 → 240 | +33 | 435 → 520 | +85 | Good (7/10) |
| 3.0 V6 240hp | 240 → 255 | +15 | 300 → 320 | +20 | Moderate (4/10) |
| 4.2 V8 R 400hp | 400 → 420 | +20 | 541 → 565 | +24 | Limited (3/10) |
Get a personalised remap quote for your Jaguar S Type. 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.
