The current NEDC determines "urban, extra-urban and combined" values based on of a theoretical driving profile, the WLTP uses "real" driving profiles drawn from a global statistical survey. The WLTP driving cycle is divided into four parts with different average speeds: low, medium, high and extra high. Each part contains a variety of driving phases, stops, acceleration and braking phases, etc. that represent everyday driving profiles. Each engine/transmission combination is tested with the most economical as well as the most fuel-intensive vehicle equipment.

Opel is currently in the process of testing each model in the range according to WLTP standards. The published values define a range from the lowest to the highest consumption for each engine/transmission combination. This gives an accurate indication of the expected daily consumption of each model. 

Please note: The values based on the WLTP driving cycle are determined using a standardized, predefined drive cycle on a test rig.