The gap between official test results for CO2 emissions/fuel economy and real-world performance has increased to 40% on average in 2014 from 8% in 2001, according to T&E’s 2015 Mind the Gap report, which analyses on-the-road fuel consumption by motorists and highlights the abuses by carmakers of

Some Mercedes, BMW and Peugeot models consuming around 50% more fuel than official results, new study reveals