New to this site - if I'm doing anything wrong please give me a chance to correct myself before hitting me with close question etc!
I'm very interested in the efficiency of car engines, particularly in relation to year (focus on past two decades), manufacturer (focus on BMW but all would be much more useful), volume and cylinder count. Also interested in RPM and throttle position, but I think that's a separate question.
To clarify, I specify engine efficiency as the efficiency of conversion from fuel energy to kinetic energy. Wikipedia cites it as around 20-25% - I'm curious about how this number varies with the aforementioned variables. I'm not looking for MPG or L/100 km, as that's taking into account factors beyond the engine - car weight, aerodynamics, electronics etc.
So fields that I'd want to see:
- Model number
- First year in general production
- Fuel type (or petrol cars only)
- % Efficiency
- Maximum power output (not a must but would be helpful)
Is there any open data relating to this? I hope that by "Open" I mean "can be used for any purpose including commercial".