Vauxhall Astra (G) 1998-2004 1.6 8v 83bhp remap figures
Stock, this 1998-2004 Vauxhall Astra petrol (1.6L) produces 83bhp and 137Nm. Our expected figures for a Stage 1 remap are 96bhp and 154Nm, an expected gain of up to 13bhp and 17Nm.
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 | 83 bhp | 96 bhp | +13 bhp |
| Torque | 137 Nm | 154 Nm | +17 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 83 bhp | 137 Nm | |
| Stage 1Maximum software-only performance | 96 bhp | 154 Nm | +13 bhp +17 Nm |
| Stage 1 EcoPerformance with economy in mind | 93 bhp | 153 Nm | +10 bhp +16 Nm |
| Eco mapEconomy first | 92 bhp | 152 Nm | +9 bhp +15 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 Astra
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 Delco Multec 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 Astra 1.6 8v 83bhp?
We expect 96bhp and 154Nm against 83bhp and 137Nm as standard: up to +13bhp and +17Nm. 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 Astra 1.6 8v 83bhp?
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: 93bhp and 153Nm expected. The Eco map is economy first: 92bhp and 152Nm. Both still sit above the standard 83bhp and 137Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.