What is
WLTP?

Hyundai IONIQ
What is WLTP and why does it affect me?

The Worldwide Harmonised Light Vehicle Test Procedure (WLTP) is a new vehicle test procedure which is both laboratory and road based. It has been developed to provide more accurate measurements of a vehicle’s fuel economy (MPG) and emissions (CO2) which are closer to those found in real driving conditions.

WLTP came into effect in September 2017 for all new models. From September 2018 any new vehicle which has been registered as a new car, will have been tested under WLTP.

WLTP allows customers to compare vehicles on a level playing field, with more accurate fuel economy and CO2 data.

This is because, the testing procedure covers:

  • More realistic driving behaviour
  • A greater range of driving situations (urban, suburban, main road, motorway)
  • Longer test distances
  • More realistic ambient temperatures, closer to the UK and European average
  • Higher average and maximum speeds
  • Higher average and maximum drive power
  • More dynamic and representative accelerations and decelerations
  • Shorter stops
  • Optional equipment: CO2 values and fuel consumption are provided for individual vehicles as built
  • Stricter car set-up and measurement conditions
  • Enables best and worst-case values on consumer information, reflecting the options available for similar car models.
How did cars used to be tested?

The old artificial laboratory test – called the New European Driving Cycle (NEDC) – was designed in the 1980s. The aim of the test was only to serve as a comparison of fuel consumption figures on different vehicles. Because it didn’t reflect real driving conditions this way of testing became out of date.

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.

What’s the difference in testing procedures between NEDC and WLTP?

Source: http://wltpfacts.eu/from-nedc-to-wltp-change/

What other standards do Hyundai Cars comply with?

All of our passenger vehicle engines will comply with Euro 6d-TEMP standards. This means our vehicles undertake the WLTP laboratory test and these figures are verified via a complimentary test (RDE - Real Driving Emissions) which adds a real-world element, including variations in temperature, incline, driving style, speed and payload, ensuring maximum accuracy overall.

Will WLTP change my car tax?

The amount of car tax you pay is based on the CO2 emissions of your car. The transition to WLTP being used for taxation purposes will take place from April 2020. As a result, the WLTP CO2 emissions will be converted into NEDC ‘equivalent’ numbers which will be used for taxation purposes and will appear on our website and other Hyundai product related or marketing materials.

The Government will announce tax bandings as part of the normal budget process.

Will you show technical information any differently?

For petrol /diesel cars, the terms used to describe test cycle driving phases in relation to fuel consumption: “urban”, “extra-urban” and “combined”, will no longer be used. Driving cycles are profiles of everyday driving habits.

In their place, the driving cycle data will be expressed as “Low”, “Medium”, “High”, “Extra-high” and “Combined”. For plugin-hybrid cars, a weighted combined figure is used, which represents the percentage of electric driving vs. combustion engine driving.

For internal combustion engine and hybrid cars:

  • Low Phase MPG (l/100km)
  • Mid Phase MPG (l/100km)
  • High Phase MPG (l/100km)
  • Extra High Phase MPG (l/100km)
  • Combined MPG (l/100km)

For Plugin-hybrid cars:

  • WLTP- Weighted Combined MPG (l/100 km)
More information

Find out more about WLTP

Find out more about our range of cars