Are these tax rates right?
You are absolutely right. From 2008 onwards, both road tax and VRT are set purely on CO2 emissions, so the lower, the better. Engine capacity only applies pre-2008, so in your case (looking at 2015 and 2016 UK cars) you will pay less road tax and VRT (which is set as a percentage of the Open Market Selling Price of the car in question) on the 2.0-litre diesel with 134g/km than you would on the 1.4-litre petrol with 158g/km. We can’t comment on the VRT, because we’d need to know the make and model of car you’re interested in to know its OMSP to work out its VRT bill, but you’ve got the tax bands right – the diesel will sit in Band B2 (131-140g/km) and incur €280 of road tax per annum, while the petrol will be in Band D (156-170g/km) and will therefore cost €570 every year.
Shane O' Donoghue - 11-Sep-2019