Real-world testing made by Emissions Analytics shows the real NOx levels of the diesels and petrols, awarding many Volkswagen-powered cars with top ratings.
The vehicle emissions measurement company Emissions Analytics put together a EQUA Air Quality Index scheme based on the level of emissions of nitrogen oxides in grams per kilometer emitted during real-world tests conducted by the firm. The independently financed new top was launched with a first batch of over 440 diesels, including 112 cars fitted with the latest diesel and petrol Euro 6 engines, with cars being rated from ‘A’ to ‘H’ depending on their emission levels. Emissions Analytics said the project would continuously add new vehicles to its database in order to form a compelling resource.
Despite the ongoing emission scandal, there were quite a lot of Volkswagen Group’s diesels receiving A grades, including Audi A5 Audi A5, Skoda Superb, Volkswagen Passat, Golf SV or Scirocco. Among the top diesels from other automakers, only BMW 3 Series managed to qualify for a top emission rating. Going to the bottom of the chart, Fiat 500x, Ssangyong Korando and Audi A8 were the worst performers, with a H grading, equivalent to over 12 times the legal limit.
The company tested the cars within a few months of first registration with between 1,000 and 5,000 miles on the clock. Emissions Analytics said this age of vehicle was used because it ensured that the model has been “de-greened” for a period, but has not been exposed to the variables associated with longer-term driving, such as servicing or other maintenance habits.
The full chart can be found here.