Vauxhall Signum 2004-2005 1.9 CDTi 150bhp remap figures
Stock, this 2004-2005 Vauxhall Signum diesel (1.9L) produces 150bhp and 315Nm. Our expected figures for a Stage 1 remap are 201bhp and 420Nm, an expected gain of up to 51bhp and 105Nm.
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 | 150 bhp | 201 bhp | +51 bhp |
| Torque | 315 Nm | 420 Nm | +105 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 150 bhp | 315 Nm | |
| Stage 1Maximum software-only performance | 201 bhp | 420 Nm | +51 bhp +105 Nm |
| Stage 1 EcoPerformance with economy in mind | 188 bhp | 412 Nm | +38 bhp +97 Nm |
| Eco mapEconomy first | 184 bhp | 406 Nm | +34 bhp +91 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 Signum
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 Bosch EDC16C9. 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 Vauxhall Signum 1.9 CDTi 150bhp?
We expect 201bhp and 420Nm against 150bhp and 315Nm as standard: up to +51bhp and +105Nm. 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 Vauxhall Signum 1.9 CDTi 150bhp?
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: 188bhp and 412Nm expected. The Eco map is economy first: 184bhp and 406Nm. Both still sit above the standard 150bhp and 315Nm.
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 Vauxhall Signum figures
Other diesel variants
- 1.9 CDTi 150bhp 2006-2008
- 3.0 V6 CDTi 174bhp 2004-2008
- 1.9 CDTi 120bhp 2004-2006
- 1.9 CDTi 120bhp 2006-2008
- 3.0 V6 CDTi 181bhp 2004-2008
All diesel Signum variants · Signum 2004-2008 overview · All Vauxhall figures