New WLTP rules for vans could potentially disincentivise fleets from adopting fuel-saving designs, undermining some of the benefits of the new testing cycle.
So says Arval UK as it warns that the WLTP data being used for converted and bodied chassis only take into account the frontal dimensions of the vehicle and do not include any streamlining measures fitted by bodybuilders such as aerodynamic collars and bulkheads.
According to Eddie Parker, product manager, LCVs, at Arval UK, the issue is likely to affect Luton and box bodies, which are widely used by businesses ranging from individual traders through to major fleets.
He said: “Streamlining of custom bodies for light commercial vehicles has come a long way in recent years. Features designed to reduce the drag of the van can have a very worthwhile impact on fuel consumption, perhaps 3-5%.
“However, this fact is not recognised in the WLTP data produced for body builders, which only take into account the frontal area of the vehicle. This approach doesn’t recognise the value of streamlining.”
Although fleets deploying streamlined designs would still see benefits in terms of real-world MPG, the change could still affect levels of adoption.
However, he added that Arval UK was supportive of WLTP in general and believed that its introduction would be a positive move.
“WLTP provides buyers of vans, whether they operate one or a thousand, with a much better guide to how their vehicle will perform in the real world, which is something that we very much welcome.
“Also, the introduction of WLTP for LCVs has been much smoother than for cars thanks to lessons learnt by manufacturers at that time, especially when it comes to overall supply of vehicles. These are major positives.
“However, the lack of recognition for streamlining is potentially an issue and we believe there is a strong argument for revisiting the subject,” he finished.
