Considering an ECU remap for your Vauxhall Astra 1.9 CDTi 120hp? A Stage 1 remap can take this (H) - 2004 - 2009 diesel engine from 120 BHP to 150 BHP and from 280 Nm to 360 Nm of torque (turbocharged). This engine scores 7.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Vauxhall Astra can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Vauxhall Astra 1.9 CDTi 120hp is a 1.9L turbocharged diesel engine producing 120 BHP and 280 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 150 BHP and 360 Nm — a gain of around 30 BHP (25%) and 80 Nm (29%).
This engine scores highly for remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as high, based on the percentage gain available from the factory output.
Considerations: Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.
Fuel economy note: possible improvement with conservative driving.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 1.3 CDTi 90hp | 90 → 110 | +20 | 200 → 250 | +50 | Good (7.5/10) |
| 1.4i 90hp | 90 → 100 | +10 | 125 → 140 | +15 | Moderate (4.5/10) |
| 1.9 CDTi 100hp | 100 → 150 | +50 | 260 → 360 | +100 | Excellent (8/10) |
| 1.6i 16v 105hp | 105 → 115 | +10 | 150 → 165 | +15 | Moderate (4/10) |
| 1.6i 16v 115hp | 115 → 125 | +10 | 155 → 170 | +15 | Moderate (4/10) |
| 1.8i 16v 140hp | 140 → 150 | +10 | 175 → 190 | +15 | Moderate (4/10) |
| 1.9 CDTi 150hp | 150 → 190 | +40 | 320 → 400 | +80 | Good (7.5/10) |
| 2.0 Turbo 170hp | 170 → 200 | +30 | 250 → 300 | +50 | Good (7/10) |
| 1.6 Turbo 180hp | 180 → 210 | +30 | 230 → 300 | +70 | Good (7.5/10) |
| 2.0 Turbo 200hp | 200 → 240 | +40 | 262 → 360 | +98 | Good (7.5/10) |
| 2.0 Turbo OPC 240hp | 240 → 275 | +35 | 320 → 400 | +80 | Good (7/10) |
Get a personalised remap quote for your Vauxhall Astra. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
