Vauxhall Signum 2004-2008 2.0T 172bhp remap figures
Thinking of remapping a Vauxhall Signum 2.0T 172bhp? The standard car makes 172bhp and 264Nm; with a Stage 1 remap from our Leicester workshop we expect around 210bhp and 310Nm, up to +38bhp and +46Nm.
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 | 172 bhp | 210 bhp | +38 bhp |
| Torque | 264 Nm | 310 Nm | +46 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 172 bhp | 264 Nm | |
| Stage 1Maximum software-only performance | 210 bhp | 310 Nm | +38 bhp +46 Nm |
| Stage 1 EcoPerformance with economy in mind | 201 bhp | 306 Nm | +29 bhp +42 Nm |
| Eco mapEconomy first | 197 bhp | 304 Nm | +25 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 Signum
Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.
Engine management is by a Trionic 8 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 2.0T 172bhp?
We expect 210bhp and 310Nm against 172bhp and 264Nm as standard: up to +38bhp 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 Vauxhall Signum 2.0T 172bhp?
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: 201bhp and 306Nm expected. The Eco map is economy first: 197bhp and 304Nm. Both still sit above the standard 172bhp and 264Nm.
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 petrol variants
All petrol Signum variants · Signum 2004-2008 overview · All Vauxhall figures