All new petrol, diesel and hybrid cars are assessed by the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) – a laboratory test that is used to measure fuel consumption and CO2 emissions from passenger cars, as well as their pollutant emissions. And great news, top of the list of the best performers this year was our 2.0 i-MMD CR-V Hybrid SR, achieving an average true mpg of 47.4, an improvement of nearly 16% on the WLTP combined figure of 40.9.

56 new models under the WLTP independent True MPG test to determine their real-world fuel economy. The figure was then compared to the manufacturer’s claimed figure.

On average, vehicles were 5.4% less efficient than the WLTP figures suggested, but the research revealed significant differences between models.

The worst performers were found to be more than 20% less efficient than their official figures, while our CR-V hybrid was found to be the best of the lot, at 15% more efficient.

The tougher and longer WLTP emissions and type approval test was introduced in 2017 by the European Commission and became mandatory for all new vehicles from September 2018 onwards. The WLTP test replaced the previous New European Driving Cycle (NEDC) type approval test, which dated back to the 1980s, with the aim of providing more accurate fuel consumption figures for new car buyers.

The new WLTP test is significantly more accurate than the NEDC test, according to What Car?’s figures. In a previous study of 159 vehicles tested under the NEDC protocol, there was an average discrepancy of 20.2% between True MPG and the manufacturer quoted figures – with the worst performers as much as 40% less efficient than advertised.

Steve Huntingford, editor of What Car?, said: “For years, most buyers have taken the official fuel economy figures with a grain of salt. Our research shows that while the latest test is more accurate, there are still large differences on some makes and models, which is why it’s important for buyers to do their research before buying.”

For the full list of true mpg results versus WLTP figures, visit

Scroll to Top