WLTP is a laboratory test cycle. It's useful for comparing cars on a level playing field, but it's run at gentle average speeds and mild temperatures, so it flatters real-world range — most at motorway speed and in the cold.
Rather than discount WLTP by a flat percentage, we don't use it to compute range at all. Our model works from each car's physics — drag, mass, efficiency, heater type, battery health — to estimate range at real speeds and temperatures.
That's why the car pages show separate mild, winter and motorway numbers instead of one badge figure. WLTP is shown only for reference. The full method is on the methodology page.