I am looking to buy a used Peugeot 2008 petrol auto 1.2 engine. My online research has shown that prior to 2017 the VED payable is £20 but after that date is £155. Looking at the CO2 emissions it seems the older cars emitted less which seems at odds with progressive engine design which usually dictates that engines are more efficient. Do these figures suggest that the later engines are less efficient or are the newer engines quicker (from 0-62)? I would be much happier paying £20 per annum than the larger amount and at my age (80+). The age of the car is not as important as a low mileage, well-looked after model.