SOME CAR MAKERS WON’T DISCLOSE NEW FUEL ECONOMY TEST RESULTS
WLTP, THE NEW, more real-world-representative fuel economy test, has given car makers a tough time in trying to get every model in their ranges tested before 1 September. Now that deadline has passed, just how many cars have been taken off sale and by how much the official fuel economy figure has increased for those cars left can now be revealed (p15).
Yet the taxation system remains based on the old NEDC economy tests. And some car makers are not publishing figures from the WLTP tests but are instead taking figures from the WLTP tests and converting them back to NEDC equivalents and publishing only that figure.
We all know how unreliable NEDC is, yet some car makers are still not letting us know exactly how a car performs in the WLTP test. A new Wltp-based taxation system won’t be implemented until April 2020, and only then are we likely to see the real figures.
We’re in favour of WLTP – greater transparency and more relevant fuel economy figures must be embraced – but the way its implementation has been handled by legislators and that some in the industry have not yet disclosed the results have not inspired trust in the new system in the way that it should.