The road tax basis differs per country. Some are using CO2 per km, others weight, it depends. I didn't think it was too high when I still owned a car (in Irela

The road tax basis differs per country. Some are using CO2 per km, others weight, it depends. I didn't think it was too high when I still owned a car (in Ireland). And this was a petrol car which was very unfavourable in the CO2-based tax regime.