Vauxhall Astra (J) 2015> 1.4 16v Turbo 123bhp Stage 1 Eco remap figures
The Stage 1 Eco map for the Vauxhall Astra 1.4 16v Turbo 123bhp (2015>): 151bhp and 298Nm expected from a standard 123bhp and 245Nm, up to +28bhp and +53Nm. It keeps most of the Stage 1 gain (Stage 1 is 160bhp and 303Nm) and is tuned with economy in mind: the choice if you want the performance and care what each tank costs.
Choose your map
Stage 1 Eco remap figures
Stage 1 Eco is performance with economy in mind. It keeps most of the Stage 1 gain, so the car still pulls well, but the map is shaped for efficient, relaxed driving rather than flat-out output. It is above the standard figures. We don't quote mpg, because economy depends on the car and how it is driven.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 123 bhp | 151 bhp | +28 bhp |
| Torque | 245 Nm | 298 Nm | +53 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 123 bhp | 245 Nm | |
| Stage 1Maximum software-only performance | 160 bhp | 303 Nm | +37 bhp +58 Nm |
| Stage 1 EcoPerformance with economy in mind | 151 bhp | 298 Nm | +28 bhp +53 Nm |
| Eco mapEconomy first | 148 bhp | 295 Nm | +25 bhp +50 Nm |
Who is the Stage 1 Eco map for?
- Drivers who want a quicker, more responsive car, tuned with economy in mind.
- Daily drivers who want strong mid-range pull without giving up efficiency.
- Anyone who would otherwise take full Stage 1 but cares what each tank costs.
How Stage 1 Eco compares with Stage 1
Full Stage 1 on this Vauxhall Astra is expected to give 160bhp and 303Nm (+37bhp, +58Nm). The Stage 1 Eco keeps about 76% of that power gain and 91% of the torque gain, so you get 151bhp and 298Nm: 9bhp less and 5Nm less than Stage 1, with the map shaped for efficient, relaxed driving, so it suits you if you want the pull and care about running costs. Both sit above the standard 123bhp and 245Nm.
What this means for your Astra
Turbocharged petrol engines respond well to calibration changes: boost and timing are the main levers, and the result is a flatter, stronger torque curve as well as a higher peak.
Engine management is by a Delco E78 unit. Newer ECUs often protect their software, so we read the exact unit and version on the car before confirming the figures on this page.
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 Eco questions
How much power does the Stage 1 Eco map give the Vauxhall Astra 1.4 16v Turbo 123bhp?
We expect 151bhp and 298Nm against 123bhp and 245Nm as standard: up to +28bhp and +53Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
How does Stage 1 Eco differ from Stage 1 on this engine?
Full Stage 1 is expected to give 160bhp and 303Nm. Stage 1 Eco gives 9bhp less and 5Nm less, in exchange for a map shaped with economy in mind. It still sits above the standard figures.
Is Stage 1 Eco or the Eco map better for me?
Choose Stage 1 Eco if you want the performance (151bhp and 298Nm) and still care about running costs. Choose the Eco map (148bhp and 295Nm) if economy matters more than pace.
Will the Stage 1 Eco map save fuel?
It is tuned with economy in mind while keeping most of the Stage 1 performance. We do not quote mpg figures, because economy depends on the car, its condition and how it is driven.
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 Astra figures
Other petrol variants
- 1.4 16v Turbo 118bhp 2009-2016
- 1.6 16v VVT 113bhp 2009-2016
- 1.4 16v Turbo 138bhp 2009-2016
- 1.4 16v VVT 99bhp 2009-2016
- 1.4 16v VVT 86bhp 2009-2016
- 1.6 16v Turbo 177bhp 2009-2016
- 1.6 16v Turbo 197bhp 2013>
- 2.0 Turbo VXR 276bhp 2009-2016
All petrol Astra (J) variants · Astra (J) 2009-2016 overview · All Vauxhall figures