Considering an ECU remap for your Opel Astra 1.8i 16v 115hp? A Stage 1 remap can take this (G) - 1998 - 2004 petrol engine from 115 BHP to 125 BHP and from 170 Nm to 185 Nm of torque (naturally aspirated). This engine scores 4/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Opel Astra can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Opel Astra 1.8i 16v 115hp is a 1.8L naturally aspirated petrol engine producing 115 BHP and 170 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 125 BHP and 185 Nm — a gain of around 10 BHP (9%) and 15 Nm (9%).
This engine has limited 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 limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.
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 |
|---|
| 1.2i 16v 65hp | 65 → 70 | +5 | 110 → 120 | +10 | Moderate (4/10) |
| 1.7 DTI 16v 75hp | 75 → 104 | +29 | 165 → 214 | +49 | Excellent (8/10) |
| 1.7 CDTi 80hp | 80 → 105 | +25 | 170 → 230 | +60 | Excellent (8/10) |
| 2.0 DI 82hp | 82 → 107 | +25 | 185 → 235 | +50 | Good (7.5/10) |
| 1.6i 16v 100hp | 100 → 110 | +10 | 150 → 165 | +15 | Moderate (4.5/10) |
| 2.0 DTI 100hp | 100 → 125 | +25 | 230 → 280 | +50 | Good (7.5/10) |
| 2.2 DTI 125hp | 125 → 150 | +25 | 280 → 320 | +40 | Good (7/10) |
| 1.8i 16v 125hp | 125 → 135 | +10 | 170 → 195 | +25 | Moderate (4.5/10) |
| 2.0i 16v 136hp | 136 → 146 | +10 | 188 → 203 | +15 | Moderate (4/10) |
| 2.2i 16v 147hp | 147 → 160 | +13 | 203 → 218 | +15 | Moderate (4/10) |
| 2.0i 16v OPC 160hp | 160 → 170 | +10 | 188 → 203 | +15 | Moderate (4/10) |
| 2.0T OPC 200hp | 200 → 235 | +35 | 250 → 300 | +50 | Good (7/10) |
Get a personalised remap quote for your Opel 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.
