1. What is WLTP?
The Worldwide Harmonized Light-Duty Vehicles Test Procedure or WLTP was introduced in September 2017 and represents a new, worldwide standard cycle. WLTP aims to utilise a profile more similar to actual daily driving behaviour than the previous NEDC standard. The new procedure is intended to provide a more realistic representation of a vehicle’s consumption. This is based on a modified test cycle with stricter test specifications.
2. What is the difference between the NEDC test and the WLTP test?
Both test cycles are carried out in lab conditions. The WLTP test cycle has been redefined in such a way that EU Regulatory bodies view it as more representative of customer driving (ie higher speeds and loads, more dynamic accelerations, fewer and shorter stop phases). The current NEDC test measures curb weight and rolling resistance. WLTP includes the effect of options on the vehicle’s aerodynamics, rolling resistance and mass when measuring its fuel consumption and emissions.
3. What will WLTP measure?
WLTP will measure a vehicle’s individual CO2 emissions, fuel consumption (MPG) and pollutant emissions (for example NOx). This is the case currently under NEDC, however WLTP will take into account vehicle mass (including optional equipment), tyre rolling resistance class and aerodynamics. The values obtained through WLTP will be comparable worldwide.
4. What does WLTP mean for me as a customer?
WLTP will provide customers with greater clarity in relation to the emissions and consumption values of their vehicle. It is important to note that due to the testing aligning closer to real world emissions, this could result in higher consumption and emissions values for vehicles with combustion engines and a shorter electric range for electric vehicles (including plug-in hybrids).
5. Will the model portfolio of SEAT change?
No. At present no changes to the model portfolio are planned. Individual models and their engines will be developed in order to achieve even higher efficiency and reduce emissions as per the regulations. However, models will not be discontinued as a result of WLTP.
6. When are the changes happening and how does it impact on taxation?
• As Volkswagen progresses with the WLTP transition, the following type approval timings will apply:
Passenger vehicles (M type and Category N1 (i)):
• From September 2017, all new model introductions will be subject to WLTP type approval and Real Driving Emissions (RDE) testing
• From September 2018, all new sales will have received type approval under WLTP
• From September 2019, all new registrations will be subject to RDE testing
Light Commercial Vehicles (Categories N1 (ii), N1 (iii) and N2):
• From September 2018, all new Light Commercial vehicle model introductions will be subject to WLTP type approval and Real Driving Emissions (RDE) testing
• From September 2019, all new sales of Light Commercial Vehicles will have received type approval under WLTP and all new registrations will be subject to RDE testing
NEDC will continue to be used for the official emissions (CO2) and fuel consumption (MPG) values. As and when WLTP figures become available for new model introductions, these will also be available for customers. It is worth noting that the NEDC CO2 values will be used for taxation for the tax years 2017/2018; 2018/2019 and 2019/2020. It is only for new cars registered after April 2020, that the WLTP values will be used for taxation purposes.
7. What is the benefit of lab testing for vehicle emissions?
Lab tests enable consumers to compare CO2 emissions and fuel consumption across different manufacturers and models in a controlled environment. As a standardised and repeatable procedure, it allows for comparison across brand and model in similar, standardised conditions.
8. How does the current NEDC testing programme operate?
The current lab test, known as the New European Driving Cycle (NEDC), measures fuel consumption (MPG), CO2 and pollutant emissions against EU regulations, in certain, standardised conditions. The standardised testing procedure allows the comparison of emissions between different vehicle models.
9. When will SEAT begin to communicate WLTP values?
We are underway with testing vehicles under the WLTP testing procedure for new to market vehicles. Once a vehicle has been tested under WLTP and the type approval has been issued, customers will be informed of the WLTP values for that vehicle.