WHAT IS WLPT ? (Worldwide Harmonised Light Vehicle Test Procedure) AND HOW DOES IT WORK?
The old lab test – called the New European Driving Cycle (NEDC) – was designed in the 1980s. Due to evolutions in technology and driving conditions, it became outdated. The European Union has therefore developed a new test, called the Worldwide Harmonised Light Vehicle Test Procedure (WLTP). The EU automobile industry welcomes the shift to WLTP and has actively contributed to the development of this new test cycle.
While the old NEDC test determined test values based on a theoretical driving profile, the WLTP cycle was developed using real-driving data, gathered from around the world. WLTP therefore better represents everyday driving profiles.
The WLTP driving cycle is divided into four parts with different average speeds: low, medium, high and extra high. Each part contains a variety of driving phases, stops, acceleration and braking phases. For a certain car type, each powertrain configuration is tested with WLTP for the car’s lightest (most economical) and heaviest (least economical) version.
WLTP was developed with the aim of being used as a global test cycle across different world regions, so pollutant and CO2 emissions as well as fuel consumption values would be comparable worldwide. However, while the WLTP has a common global ‘core’, the European Union and other regions will apply the test in different ways depending on their road traffic laws and needs.
The amount of CO2 a car emits is directly related to the amount of fuel it consumes. For instance, a diesel car emitting 95g CO2 per kilometre consumes around 3.7 litres of fuel per 100km, while a petrol car consumes around 4 litres/100km for the same CO2 emissions.
Fuel efficiency, sometimes referred to as fuel economy, is the relationship between the distance travelled and the fuel consumed.
Even though the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) will provide a far more realistic representation of conditions encountered on the road than the old NEDC lab test (New European Driving Cycle), it will not cover all possible variations. Moreover, each individual driver will continue to have a different driving style: one driver might accelerate faster, take corners faster or brake more suddenly than another who might drive more conservatively.
Given that driving behaviour, traffic and weather conditions will continue to differ from one country to another, there will still be a difference between emissions measured in lab conditions and the real world. However, as there is no single real-world emission value, only values obtained by standardised laboratory tests allow us to directly compare the emissions and fuel consumption of different car models from different car manufacturers
Practically, your car’s fuel consumption performance will not change with these new WLTP values. The Worldwide Harmonised Light Vehicle Test Procedure will result in a higher g/km CO2 value for the one and same vehicle compared to NEDC, simply because it is a more rigorous and longer test – meaning the WLTP will provide a better reflection of today’s situation than the NEDC. In other words, the higher CO2 value does not mean increased fuel consumption, but rather a more realistic CO2 value due to the change in how the vehicles are tested
The old lab test – called the New European Driving Cycle (NEDC) – was designed in the 1980s and became outdated today due to several evolutions in technology and driving conditions.
The European Union has therefore prepared a new test, called the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) that applies from September 2017.
The above are extracts that have been taken from WLTP FACTS .EU as a guide on WLTP (Worldwide Harmonised Light Vehicle Test Procedure) full in-depth details can be found on their website www.wltpfacts.eu
* All vehicle images and car descriptions on this site are for illustration and reference purposes only and are not necessarily an accurate representation of the vehicle on offer.
Vehicles4work & Car Lease Shop
Car Lease Shop
38 Old Street
Registered Office : Bank Chambers 31 The Square Cumnock KA18 1AT
| Company Reg No : SC377900 | Data Protection No : ZA096949 | VAT No : 106370738 |
WRK Solutions Ltd trading as Vehicles4work & Car Lease Shop and Car Lease Shop are a credit broker and not a lender, we are regulated by the Financial Conduct Authority. Registered No : 673783
Copyright © 2020 Vehicles4work & Car Lease Shop, All rights reserved.