WLTP (Worldwide Harmonised Light Vehicles Test Procedure)

It replaced the older NEDC cycle in the EU from 2017 for new types and 2018 for all new cars. It is longer and more dynamic than NEDC and considers optional equipment that affects weight and aerodynamics. Values are measured in a laboratory, so real driving can differ.

The car runs a fixed speed profile on a test bench while consumption and emissions are measured.

WLTP figures are good for comparing cars, but real consumption and range in winter or on motorways are often higher or lower. The United States uses EPA tests, which give different figures for the same car.