A new study has found that, on average, fuel economy and CO2 emissions are roughly 20 per cent worse than the official WLTP figures suggest.

The report, courtesy of the European Union’s First Commission, studied a sample of 600,000 cars and found that petrol cars are typically 24 per cent more inefficient and polluting than what their official WLTP ratings may suggest, while diesel models fall 18% shy of their emissions and MPG targets.
Even worse are plug-in hybrid (PHEV) cars. According to the Commission, PHEVs typically emit three-and-a-half times more CO2 in real-world driving than what’s officially shown in the WLTP test results.  

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Study Finds That Real World C02 Emissions Are 20% Worse Than Official Figures

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