Latest Ratings

For 2020, the rating now considers the emissions of greenhouse gases, with the addition of a third index. As before, the Clean Air Index indicates how well a car limits the emissions of pollutants – those by-products of the combustion process which are harmful to health – but now also measures ammonia (NH₃) and analyses in more detail the Oxides of Nitrogen. The Energy Efficiency Index signifies how effective the car is at turning its source of energy – be that petrol, diesel, gas or electricity – into movement, and minimising losses. The new Greenhouse Gas Index indicates how well a vehicle limits emissions of those gases which contribute to global warming by measuring the amount of carbon dioxide (CO₂), Methane (CH₄) and Nitrous Oxide (N₂O) that are expelled during Green NCAP’s rigorous tests. All three indexes are given equal weight. 2020 ratings should not be compared with those of previous years.