The current lab test – called the New European Driving Cycle (NEDC) – was designed in the 1980s and today can be considered outdated due to several evolutions in technology and driving conditions.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 will apply from September 2017.
main differences between the two test procedures:
|Test cycle||Single test cycle||Specific test cycles for three different power-to-weight classes of vehicles|
|Cycle time||20 minutes||30 minutes|
|Cycle distance||11 kilometre||23.25 kilometre|
|Phases (representing road types)||2 phases, 37% urban and 63% extra-urban||4 phases with more emphasis on high performance, 13% urban and 87% extra-urban|
|Average speed||34 kilometre per hour||46.5 kilometre per hour|
|Maximum speed||120 kilometre per hour||131 kilometre per hour|
|Influence of optional equipment||Impact on CO2 and fuel performance not considered under NEDC||Additional features (which can differ per car) are taken into account|
|Gear shifts||Vehicles have fixed gear shift points||Different gear shift points for each vehicle|
|Test temperatures||20-30°C||23°C set-point in the lab|