Worldwide Harmonised Light Vehicle Test Procedure (WLTP)

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What is the Worldwide Harmonised Light Vehicle Test Procedure (WLTP)?

The Worldwide Harmonised Light Vehicle Test Procedure (WLTP) is a laboratory test that is used to measure fuel consumption and CO2 emissions from passenger cars, as well as their pollutant emissions. All new cars sold to the public have to undergo such tests. Introduced in 2018 to replace the previous NEDC testing regime, WLTP was developed using actual driving data, and so is designed to better represent how cars are used in real-world conditions.

Related Jargon

What are a car's CO2 emissions?

When petrol or diesel burns in an engine, carbon dioxide gas – also known as CO2 – is the result.

What is the New European Driving Cycle (NEDC)?

The New European Driving Cycle (NEDC) is a laboratory-based test designed to assess the emission levels of car engines and fuel economy of car models on sale.

What is the Worldwide Harmonised Light Vehicle Test Procedure (WLTP)?

The Worldwide Harmonised Light Vehicle Test Procedure (WLTP) is a laboratory test that is used to measure fuel consumption and CO2 emissions from passenger cars, as well as their pollutant emissions.

What is vehicle excise duty (VED)?

Commonly known as road tax or car tax, Vehicle Excise Duty (VED) is the annual tax that the owner of a vehicle has to pay to the government for it to be used (or parked) on public roads.

Why is mpg important?

In Britain, a car’s fuel consumption is measured in miles per gallon, which is shortened to MPG.