Vauxhall will voluntarily publish real-world CO2 and NOx emissions data from the second quarter of next year.
Vauxhall and parent company Opel will publish figures recorded during the World Harmonized Light Vehicles Test Procedure (WLTP) alongside its regular fuel consumption and CO2 figures. The first vehicle to have its WLTP figures published will be the new Astra.
The current ‘New European Driving Cycle’ emissions test - which has been widely criticised as being old fashioned and 'not fit for purpose' in the wake of the Volkswagen emissions scandal - is to be replaced by the more modern WLTP in 2017.
The WLTP is capable of replicating real-world driving more closely than the NEDC, meaning that its claimed fuel consumption and CO2 figures are capable of being replicated by customers. Vauxhall is the first manufacturer to agree to publish WTLP figures ahead of the test becoming mandatory.
Vauxhall says it is also working towards several improvements in Selective Catalytic Reduction (SCR) exhaust treatments in Euro 6 engines. Vauxhall will use SCR as a staple device in its future Euro 6 diesel powertrains in the future.