Jaguar XJ (X351) 2010> 5.0 V8 S/C 502bhp remap figures
Thinking of remapping a Jaguar XJ 5.0 V8 S/C 502bhp? The standard car makes 502bhp and 625Nm; with a Stage 1 remap from our Leicester workshop we expect around 560bhp and 694Nm, up to +58bhp and +69Nm.
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 | 502 bhp | 560 bhp | +58 bhp |
| Torque | 625 Nm | 694 Nm | +69 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 502 bhp | 625 Nm | |
| Stage 1Maximum software-only performance | 560 bhp | 694 Nm | +58 bhp +69 Nm |
| Stage 1 EcoPerformance with economy in mind | 546 bhp | 688 Nm | +44 bhp +63 Nm |
| Eco mapEconomy first | 541 bhp | 685 Nm | +39 bhp +60 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 P5.0SC 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 S/C 502bhp?
We expect 560bhp and 694Nm against 502bhp and 625Nm as standard: up to +58bhp and +69Nm. 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 S/C 502bhp?
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: 546bhp and 688Nm expected. The Eco map is economy first: 541bhp and 685Nm. Both still sit above the standard 502bhp and 625Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
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Other petrol variants
All petrol XJ (X351) variants · XJ (X351) 2010> overview · All Jaguar figures