Jaguar XJ (X351) 2010> 5.0 V8 379bhp remap figures
The Jaguar XJ 5.0 V8 379bhp (2010>) is a petrol 5.0L model making 379bhp and 515Nm as standard. After a Stage 1 ECU remap we expect 414bhp and 561Nm - up to 35bhp and 46Nm more than stock.
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 | 379 bhp | 414 bhp | +35 bhp |
| Torque | 515 Nm | 561 Nm | +46 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 379 bhp | 515 Nm | |
| Stage 1Maximum software-only performance | 414 bhp | 561 Nm | +35 bhp +46 Nm |
| Stage 1 EcoPerformance with economy in mind | 405 bhp | 557 Nm | +26 bhp +42 Nm |
| Eco mapEconomy first | 402 bhp | 555 Nm | +23 bhp +40 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your XJ
Naturally aspirated petrol engines have no boost to raise, so gains from software alone are more modest than on a turbocharged car and come from fuelling, ignition and throttle response.
Engine management is by a Denso unit. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
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 5.0 V8 379bhp?
We expect 414bhp and 561Nm against 379bhp and 515Nm as standard: up to +35bhp and +46Nm. 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 5.0 V8 379bhp?
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: 405bhp and 557Nm expected. The Eco map is economy first: 402bhp and 555Nm. Both still sit above the standard 379bhp and 515Nm.
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 petrol variants
All petrol XJ (X351) variants · XJ (X351) 2010> overview · All Jaguar figures