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WLTP - realistic consumption and emission values

Facts about the new test procedure

From the NEDC to the WLTP

More realistic consumption and emission values

What is the WLTP?

The Worldwide Harmonised Light-Duty Vehicle Test Procedure (WLTP) is a new test procedure for measuring fuel consumption and CO2 and pollutant emissions of passenger cars and light-duty vehicles. This procedure will gradually replace the current New European Driving Cycle (NEDC) test procedure. One of the main objectives of the WLTP is to obtain test results under laboratory conditions that better reflect the actual vehicle use.

When will the WLTP come into force?

The WLTP will be introduced stepwise from September 2017 onwards. As of 1 September 2017, car manufacturers will have to certify new type approvals in accordance with the WLTP. From September 2018 onwards, all car manufacturers for vehicles sold in the EU and in Switzerland, Turkey, Norway, Liechtenstein, Israel and Ireland will be required by law to test in accordance with the WLTP.
For light-duty vehicles, the WLTP will come into force a little later: from September 2018 for new models and from September 2019 for all new registrations.

As soon as the legal basis for the WLTP declaration obligation in Switzerland has been finally clarified, the correlating NEDC values will be replaced by the WLTP values.

From December 2020, all countries adopting EU vehicle registration legislation will have to identify and communicate all vehicles with WLTP values.

What will change with the WLTP?

Compared to the NEDC, the WLTP tests are carried out at higher average and maximum speeds and include more accelerations and decelerations. Custom equipment is also included for the first time. Since this can have an impact on the weight and aerodynamics of a vehicle, the WLTP test will better reflect the real emissions of individually equipped vehicles.

 NEDC compared to WLTP

Number of test cycles 1 Up to 4
Cycle time 20 minutes 30 minutes
Cycle distance 11 km 23,25 km
Driving phases 2 4 (more non-urban use)
Average speed 34 km/h 46,5 km/h
Highest speed 120 km/h 131 km/h
Impact of options No Yes
Gear shifts Fixed Variable
Test temperature Between 20-30°C Fixed at 23°C


How much will the consumption and emission values increase?

Since the WLTP cycle is more realistic, the official fuel consumption and emission values for vehicles with combustion engines (ICEVs) will be higher than those measured using the previous NEDC procedure. 

At present, the WLTP CO2 level is expected to rise by up to 25% for vehicles of all brands. 

Depending on a country’s jurisdiction, this can also have an impact on CO2-related taxes and directly affect the total operating costs. The CO2 limits many companies have set in their car policy should be reviewed with regard to the WLTP. In certain cases, it may be necessary to increase CO2 levels by up to 25% to retain certain vehicles in the fleet.

What impact will the WLTP have on my fleet?

Car policy:
Within the framework of the WLTP, average CO2 levels are likely to rise. As a result, companies that have set an upper limit for CO2 in their car policy will need to analyse the precise impact of the new CO2 levels on their policy and adjust it if necessary. This is possible as soon as the official data are provided by the manufacturers.

Whereas the WLTP has been adopted at international level, vehicle taxation is country-specific. To date, no detailed information is available.

What’s next?

We will keep you informed of any changes in local legislation and taxation. If needed, we will also be happy to help you review your current car policy. Should you have any questions, please do not hesitate to contact your personal account manager at Alphabet.


We are happy to help!

+41 58 269 65 67