Here are two examples:
~ The Renault Megane Experience (1461cc) produces 0.991g/km - 12 times the limit (made in 2016, tested in January 2017)
~ The Fiat 500X CityLook Popstar (1598cc) produces 1.153g/km - 14 times the limit (made in 2015, tested in December 2015)
But the worst is the Nissan Qashqai, which last month overtook the Ford Fiesta to become the UK's most registered car (counting diesel and petrol models together).
The Qashqai N-Connecta DCI CVT (1598cc) produces 1.46g of NOx per kilometre. That is more than 18 times Europe's 0.08g/km limit.
It's almost twice Melvyn's score.
Five of my dad's Skodas would produce less NOx than this version of the Qashqai.
Asked to comment on this poor result, Nissan replied: “Nissan is committed to upholding the law and meeting or exceeding regulations in every market where we operate. All our vehicles sold in Europe meet the Euro 5/6 emission standards.”
Renault said all of its vehicles complied with the laws and regulations of the country in which they were sold, adding that it was aware of “significant potential for improvement regarding the release of nitrogen oxides (NOx) in real use conditions”. The company said it had been gradually taking action to reduce the gap between the performance of its vehicles in the lab and on the road, for example by reprogramming their engine injection computer.
The Society of Motor Manufacturers and Traders (SMMT) said carmakers were investing billions in low-emission technologies to help improve air quality, adding it that it couldn’t comment on “non-official tests”.
But how can it be that some new diesels are so dirty? Haven't they improved at all since my dad's car left the factory in 2009?
Molden explains that there is a huge range. While most petrol cars leave diesels far behind when it comes to NOx some new diesels are relatively clean and some are very dirty.
I look again at the list.
It's true the Mercedes C250 AMG Line Premium DA
produces 0.080g/km of NOx in real-world driving, so it complies with the regulations outside the lab as well as inside.
A version of the VW Tiguan (the SE-L BiTDI SCR 4MOTION Blue Motion Technology, to give it its full name) even comes in at 0.076g/km, just below the 0.08g/km limit.
Both cars produce less than a third of the amount of NOx that my dad's Skoda emits. But they are a rarity.
Source : https://www.bbc.co.uk/news/resources/idt-sh/how_toxic_is_your_car_exhaustThank you for visit my website