To find the compression ratio for a 1.4 Corsa petrol engine, I recommend you check:
* Your car's owner's manual: This will be the most accurate source of information.
* The Vauxhall (Opel) website: Look for the specific model year of your Corsa and search for technical specifications.
* Reputable automotive websites: Sites like Autodata, Haynes, or other similar resources often have technical information about cars.
* A qualified mechanic: They can provide you with the correct compression ratio for your specific engine.
Remember that compression ratios can vary slightly even within the same model year, depending on factors like the engine code and specific market.