Worldwide Harmonised Light Vehicle Test Procedure (WLTP)
The newest test for measuring fuel economy and Carbon Dioxide (CO₂) emissions is called the WLTP (Worldwide Harmonised Light Vehicle Test Procedure). WLTP introduction began in September 2017 but was not be fully rolled out until 2019.
- WLTP is a laboratory test for measuring CO₂ emissions and fuel economy for all new vehicles.
- WLTP is replaced the previous testing procedure, called NEDC (New European Driving Cycle), which was launched in the 1980s.
- The aim of WLTP is to provide CO₂ emissions and fuel economy data which is closer to real world figures than NEDC.
- WLTP testing was introduced on new vehicle models from September 2017.