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Our Euro 6 diesels are the cleanest and safest

This March, British car buyers registered almost a quarter of a million new diesel cars – an all-time high. SMMT reveals why they are so popular – and the important role they can play in helping improve air quality in towns and cities, and in tackling climate change.

In 2016, a record 1.3 million new diesel cars were registered in the UK, up 0.6% on the previous year – a trend that’s continuing in 2017. In March, more businesses and consumers chose a new diesel car than in any other month in history, with almost quarter of a million leaving showrooms.

Diesel is critical to reducing CO2 emissions, which in turn is tackling climate change – diesel cars emit, on average, 20% lower CO2 than petrol equivalents. In fact, since 2002, diesel cars have saved 3.5 million tonnes of CO2 from going into the atmosphere.

Almost one in every two new cars registered in the UK is a diesel, with buyers valuing their high performance and low fuel consumption. On average, diesels use 20% less fuel than like for like petrol models, and with diesel drivers typically covering 60% more miles, lower fuel bills are essential.

96% of the UK’s 4.8 million commercial vehicles are powered by diesel and they transport people, essential goods and our emergency services over 61 billion miles every year. Without them, life would be much harder.

Advanced diesel technology has virtually eliminated emissions of particulate matter, with 99% of these soot particulates captured by special filters fitted to all new diesel cars since 2011. Around half of diesels on the road now boast a diesel particulate filter (DPF).

The latest Euro 6/VI vehicles are the cleanest in history – and light years away from their older counterparts. As well as special filters, they also feature clever technology that converts most of the NOx from the engine into harmless nitrogen and water before it reaches the exhaust.

Euro 6/VI technology works. Real world tests using the London 159 bus route show a 95% drop in NOx compared with previous generation Euro V buses. In fact, if every older bus operating in the capital were replaced with a Euro VI version, total NOx emissions in London would fall by 7.5%.

The latest Euro 6 cars are classed as low emission for the purposes of the London Ultra Low Emission Zone due to come into force in 2019, meaning drivers of these vehicles will be free to enter the zone without charge.

Contrary to recent reports, diesel cars are not the main source of urban NOx. While road transport as a whole is responsible for around half of London’s NOx, diesel cars produce just 11%, although concentrations will vary at different times depending on congestion. Keeping traffic moving is the key to keeping emissions low.

In September this year, a new official EU-wide emissions testing system will come into force. This will involve, for the first time, on-road testing to better reflect the many and varied conditions involved in ‘real-world’ driving such as speed, congestion, road conditions and driving style. This will be the world’s toughest-ever emissions standard.

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