In order to be placed on the market, passenger cars carry out a series of tests to verify their compliance with regulations. These tests to assess fuel consumption, CO2 and pollutant emissions are carried out in the laboratory and are based on specific driving cycles. In this way, the tests are reproducible and the results comparable. This is important because only a laboratory test, which follows a standardized and repeatable procedure, allows consumers to compare different car models.
On 1 September 2017, the new Worldwide harmonised Light-duty vehicles Test Procedure (WLTP) came into force and will gradually replace the New European Driving Cycle (NEDC) protocol.