Vauxhall Signum 2004-2006 1.9 CDTi 120bhp remap figures
Thinking of remapping a Vauxhall Signum 1.9 CDTi 120bhp? The standard car makes 120bhp and 279Nm; with a Stage 1 remap from our Leicester workshop we expect around 188bhp and 390Nm, up to +68bhp and +111Nm.
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 | 120 bhp | 188 bhp | +68 bhp |
| Torque | 279 Nm | 390 Nm | +111 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 120 bhp | 279 Nm | |
| Stage 1Maximum software-only performance | 188 bhp | 390 Nm | +68 bhp +111 Nm |
| Stage 1 EcoPerformance with economy in mind | 171 bhp | 381 Nm | +51 bhp +102 Nm |
| Eco mapEconomy first | 166 bhp | 376 Nm | +46 bhp +97 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.
Engine management is by a Bosch EDC16C9 unit. 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 120bhp?
We expect 188bhp and 390Nm against 120bhp and 279Nm as standard: up to +68bhp and +111Nm. 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 120bhp?
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: 171bhp and 381Nm expected. The Eco map is economy first: 166bhp and 376Nm. Both still sit above the standard 120bhp and 279Nm.
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 120bhp 2006-2008
- 1.9 CDTi 150bhp 2004-2005
- 1.9 CDTi 150bhp 2006-2008
- 3.0 V6 CDTi 174bhp 2004-2008
- 3.0 V6 CDTi 181bhp 2004-2008
All diesel Signum variants · Signum 2004-2008 overview · All Vauxhall figures