The difference between car makers’ claimed economy figures and those achieved by consumers during everyday driving has long been a bone of contention.
In recent years the test that was used to determine fuel efficiency and CO2 emissions – the New European Drive Cycle, or NEDC – has been criticised for not accurately representing the figures that drivers might achieve in real-world use. That’s actually a bit unfair on the NEDC, because its results, in particular the ‘combined’ fuel economy figure, weren't designed to be used as the upfront marketing tools they became.
The NEDC test regime has now been replaced by the Worldwide Harmonised Light Vehicles Test Procedure, or WLTP. This system is widely accepted as being more representative of real-world economy, CO2 and electric range figures, but in most cases there remains a discrepancy between the official test results and consumers’ real-world experience.
The reality is that many variables can affect fuel efficiency and range. While the standardised test procedures, be they NEDC or WLTP, provide a useful comparative baseline, real-world traffic and weather conditions, the condition of the vehicle and, most significantly, individual driving style all play a part in determining a car's efficiency, range and emissions.
Ecomore can give consumers a better understanding of how those figures are achieved and how to adjust their driving to get closer to them in the real world, and we can help showroom staff manage customers' expectations of everyday fuel economy or electric range.