What is WLTP?

The WLTP or ‘Worldwide Harmonized Light Vehicle Test Procedure’. The latest method for determining the levels of pollutants, CO2 emissions and fuel consumption for all light vehicles. From 1 September 2019, the WLTP Regulation will apply to all light commercial vehicles in Europe with a curb weight of less than 2585 kg. This means that all new commercial vehicles sold as of this date must comply with the new guidelines in order to obtain a registration number. Only vehicles that fall under the "residual storage rule" will be granted a temporary exemption.

This rule allows non-WLTP vehicles manufactured before 1 June 2019 to be registered until 1 year after 1 September 2019. On the other hand, all vehicles without WLTP made after 1 June of this year must be registered before 1 September.

The differences between WLTP and its predecessor NEDC

WLTP measures more truthfully than the NEDC. However, the results are never completely consistent with reality, as many factors will have an influence. For example, the driving behavior, the type of roadway and the weather and traffic conditions. In short, there are three major differences where the WLTP measures differently:

The WLTP laboratory tests have updated, more realistic criteria, such as a speed of up to 131 km / h and variable gear shifting.

New cars must be tested in addition to the laboratory test on public roads. A mobile measuring station analyzes whether the exhaust gases are within the limits.

The CO2 emissions are determined individually for each car. Additional options also affect the emissions. For example, it could be that a commercial vehicle with a double cabin has a higher CO2 value due to the increased weight.

The advantages of WLTP

An honest and transparent assessment. The purpose of the WLTP is to provide a more accurate picture of fuel consumption and emissions so that the end user can better assess the performance of the vehicle. This transparency is desirable as many manufacturers are working to reduce their CO2 emissions through CSR. The CO2 emission value will therefore play a greater role in the future when buying a car or commercial vehicle. The new standards thus respond to market demand and will therefore bring benefits to the industry in the long term.

We will keep you updated whenever there is more news on the WLTP.