WLTP and RDE: New tests for the certification of fuel consumption, CO₂ and pollutant emissions
NEDC (New European Driving Cycle):
it has been the European driving cycle used so far for the measurement of fuel consumption and emissions from passenger cars and light commercial vehicles. The first European driving cycle came into force in 1970 and referred to an urban route. In 1992 it was also considered to have an extra-urban phase and since 1997 it has been used for measuring consumption and CO2 emissions. However, the composition of this cycle is no longer consistent with current driving styles and distances travelled on different types of roads. The average speed of the NEDC is only 34 km/h, accelerations are low and the maximum speed is just 120 km/h.
WLTP uses new Worldwide harmonised Light duty vehicles Test Cycles (WLTC) to measure fuel consumption, CO2 and pollutant emissions from passenger cars and light commercial vehicles. The new protocol aims to provide customers with more realistic data, better reflecting the daily use of the vehicle.
The transition from NEDC to WLTP
Road consumption and emissions of passenger cars
RDE (Real Driving Emissions): a test focused on verifying emissions on the road
What changes for customers
The new WLTP procedure will provide a more realistic criterion for comparing the fuel consumption and CO2 emission values of different vehicle models as it has been designed to better reflect real driving behaviour and take into account the specific technical characteristics of the individual model and version, including optional equipment.
To ensure clarity and maximum possible transparency, Stellantis will provide retailers and customers with detailed information on the fuel consumption and CO2 emission values of each configured car and on the minimum and maximum extremes of the various models.