London - All cars tested in an inquiry set up by the UK government after the Volkswagen diesel emissions scandal exceeded pollution limits when tested in real-world conditions.
None of the 37 top-selling cars met the current legal limits for nitrogen oxide when tested on the road, a Department for Transport (DfT) report found. Some emitted up to 12 times more than the legal limit of 180 mg/km. Cars meeting Euro 5 standards, which could be sold up to September last year, were all “substantially higher” in real world conditions than the measurements recorded in the laboratory.
The Vauxhall (Opel) Insignia was the worst performer, emitting over 1800 mg/km. Even the Citroen C4, the best performer, was found to emit around three times the legal laboratory level.
Of the 19 new models tested which meet the current Euro 6 standards of 80 mg/km in laboratory tests, none could replicate the results on the road.
The report also found results varied depending on outside temperatures, with engines producing more emissions when it was cold.