IT WAS a double victory for Vauxhall commercial vehicles, with British-built vans taking outright victory and two class wins in the Commercial Fleetworld MPG Marathon.

The event, run by Commercial Fleetworld magazine in conjunction with the AA and fleet supplier ALD Automotive, took in a gruelling 380-mile test route from Bristol to Newquay and back, covering challenging roads across Dartmoor and Exmoor on a combination of fast A-roads and twisty B-routes.

Each vehicle entered had its fuel tank sealed, and was refuelled at the end of the event, then a calculation made based on the fuel used, the van's payload and the distance covered to work out which van was the most cost-effective per tonne, per mile.

The outright winner in the commercial vehicle category, with a cost per tonne per mile of 16.9p, was a Vauxhall Vivaro 2900 LWB 2.0 CDTi with the model's new Euro IV 115PS common rail diesel engine, while a new Astravan also came top of its class, powered by a 90PS 1.3 litre CDTi unit.

Vauxhall's commercial vehicles brand manager Steve Bryant, who drove the Vivaro, said: "This is the second time that Vivaro has won the MPG Marathon, and it shows that running costs and economy are as crucial to Vauxhall as they are to its customers.

"This is a fantastic result, and is proof that Vivaro is one of the most fuel-efficient and flexible vans on the market."