Good reasons for the WLTP

The actual fuel consumption of a vehicle may differ from that claimed by the manufacturer. The validity of the results measured on the basis of the New European Driving Cycle (NEDC) have long been criticised because real consumption depends heavily on individual driving behaviour and vehicle equipment. For example, consumption varies depending on whether a vehicle is used mostly in city traffic, on rural highways, or on motorways. To account for these differences, the WLTP shifts the theoretical conditions of the NEDC to a more dynamic driving profile based on statistical surveys and an evaluation of average user profiles. This means higher acceleration rates, higher average speeds, and higher maximum speeds. And instead of simulating urban and rural traffic in a combined analysis, the vehicle is now being tested in four phases of different speed ranges.