Vauxhall Astra (K) 2016> 1.6 CDTi Bi-Turbo 157bhp remap figures
The Vauxhall Astra 1.6 CDTi Bi-Turbo 157bhp (2016>) is a diesel 1.6L model making 157bhp and 350Nm as standard. After a Stage 1 ECU remap we expect 195bhp and 425Nm - up to 38bhp and 75Nm more than stock.
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 | 157 bhp | 195 bhp | +38 bhp |
| Torque | 350 Nm | 425 Nm | +75 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 157 bhp | 350 Nm | |
| Stage 1Maximum software-only performance | 195 bhp | 425 Nm | +38 bhp +75 Nm |
| Stage 1 EcoPerformance with economy in mind | 186 bhp | 419 Nm | +29 bhp +69 Nm |
| Eco mapEconomy first | 182 bhp | 415 Nm | +25 bhp +65 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 Astra
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.
This car is listed with a Delco E98 engine control 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 questions
How much power does the Stage 1 map give the Vauxhall Astra 1.6 CDTi Bi-Turbo 157bhp?
We expect 195bhp and 425Nm against 157bhp and 350Nm as standard: up to +38bhp and +75Nm. 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 CDTi Bi-Turbo 157bhp?
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: 186bhp and 419Nm expected. The Eco map is economy first: 182bhp and 415Nm. Both still sit above the standard 157bhp and 350Nm.
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 diesel variants
All diesel Astra (K) variants · Astra (K) 2016> overview · All Vauxhall figures