Jaguar XJ (X350) 2003-2009 2.7 TDVi 204bhp remap figures
Stock, this 2003-2009 Jaguar XJ diesel (2.7L) produces 204bhp and 435Nm. Our expected figures for a Stage 1 remap are 258bhp and 503Nm, an expected gain of up to 54bhp and 68Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 204 bhp | 258 bhp | +54 bhp |
| Torque | 435 Nm | 503 Nm | +68 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 204 bhp | 435 Nm | |
| Stage 1Maximum software-only performance | 258 bhp | 503 Nm | +54 bhp +68 Nm |
| Stage 1 EcoPerformance with economy in mind | 245 bhp | 498 Nm | +41 bhp +63 Nm |
| Eco mapEconomy first | 240 bhp | 494 Nm | +36 bhp +59 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your XJ
On a diesel the biggest change is normally torque: the remap changes how much fuel and boost the ECU allows across the rev range, so pulling power arrives earlier and holds on longer.
The ECU recorded for this variant is a Siemens SID201/204. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Jaguar XJ 2.7 TDVi 204bhp?
We expect 258bhp and 503Nm against 204bhp and 435Nm as standard: up to +54bhp and +68Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Jaguar XJ 2.7 TDVi 204bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 245bhp and 498Nm expected. The Eco map is economy first: 240bhp and 494Nm. Both still sit above the standard 204bhp and 435Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Jaguar XJ figures
Other diesel variants
All diesel XJ (X350) variants · XJ (X350) 2003-2009 overview · All Jaguar figures