Start planning your choice list policies for WLTP and RDE

July 17, 2018
Posted by: majid

With less than three months until the deadline for all cars to have been tested, or retested, under the new Worldwide Harmonised Light vehicle Test Procedure (WLTP) fuel and emissions testing regime, fleets remain in a state of confusion over future emissions figures and the implications for benefit-in-kind (BIK) and national insurance (NI)contributions.

They will also, from 2019, have to contend with stage one of the Real Driving Emissions (RDE) test, which complements WLTP by measuring other emissions while the car is being driven, including NOx.

Background to WLTP

WLTP replaced the New European Drive Cycle (NEDC) in September 2017 to measure fuel consumption, CO2 emissions, pollutant emissions and the energy consumption values of all powertrains, including the range of electric and plug-in vehicles.

The new WLTP test remains a laboratory test, just like NEDC, but is intended to be much more realistic in its testing criteria.

NEDC was based on theoretical data and designed to aid comparison between models, rather than absolute efficiency, while WLTP is based on real-world data, and will deliver efficiency comparisons with a more reliable promise to the consumer.

It was developed as a global test cycle across different world regions, so pollutant and CO2 emissions as well as fuel consumption values would be comparable worldwide – hence its name.

However, while the WLTP has a common global ‘core’, the European Union (EU) will apply the test in different ways, dependent on road traffic laws and needs

Background to RDE

Impact of WLTP – CO2

Impact of WLTP –  vehicle specification 

What are the implications for the UK fleet industry?

What can fleet operators do?