Researchers have provided fresh evidence of a growing gap between vehicle emissions in laboratory tests and their performance on the road, as questions mount about the carmakers’ conduct in the wake of the Volkswagen scandal.
One of the research groups that helped uncover the VW case published new data on Friday, claiming that carbon dioxide emissions in European road tests were on average 40 per cent higher than the official laboratory results advertised in car sales literature.
The International Council on Clean Transportation, the environmental research body that led the research, said the figure was an “all-time high” and compared with a gap of just 10 per cent in 2003, though there was no suggestion that defeat devices were to blame.
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