Opel 1.8i Ecotec Tuning
Supported in 4 Opel models, 1994+.
Opel
6 supported 1.8i Ecotec applications
Models With the Opel 1.8i Ecotec
All Supported Opel 1.8i Ecotec Tunes
| Model | Years | Version | Stock power | Controller | Platform |
|---|---|---|---|---|---|
| Astra | 1998+ | G | 125 hp | ECU Siemens SIMTEC71 | AutoTuner |
| Astra | 1998+ | G | 115 hp | ECU Siemens SIMTEC71 | AutoTuner |
| Corsa | 2000+ | C | 125 hp | ECU Siemens SIMTEC71 | AutoTuner |
| Tigra | 1994+ | 125 hp | ECU Siemens SIMTEC71 | AutoTuner | |
| Vectra | 1995+ | B | 125 hp | ECU Siemens SIMTEC71 | AutoTuner |
| Vectra | 1995+ | B | 115 hp | ECU Siemens SIMTEC71 | AutoTuner |
About Opel 1.8i Ecotec tuning
We tune the Opel 1.8i Ecotec in 6 applications across the Astra, Corsa, Tigra, Vectra, from 1994+, in gasoline form, with stock outputs of 115-125 hp. Calibrations are written on AutoTuner for your exact hardware and fuel, then proven on our Dynojet 424xLC2 in Jenison, MI.
This engine runs on: Siemens SIMTEC71.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.