Review Vauxhall's VXR8 Sport Saloon Wins MPG Marathon

In an eco-marathon, you normally expect the winner to be a hybrid, a diesel or some other super-frugal -and usually underpowered- car. Well, in the Fleet World MPG Marathon the champion had no less than 431-horses kicking and screaming to be unleashed under its bonnet.

You read that correctly: the LS3 6.2-liter V8-powered VXR8 - essentially a Holden HSV rebadged as a Vauxhall for the UK market- won the two-day, 350-mile economy trial.

How did this happen? There's a simple explanation: the award wasn't given to the most fuel efficient vehicle in absolute numbers, but to the one that recorded the highest percent improvement over the official fuel consumption figures.

Ecology, GM, Holden, Holden Commodore, HSV, Offbeat News, Reports, Vauxhall, Vauxhall VXR8
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Vauxhall Insignia VXR

As you would have thought, the 0-60mph sprint time remains unchanged with the Insignia VXR Unlimited hatch equipped with a 6sp manual completing the dash in 5.6 seconds.

The package is priced at just £250 and is available with either manual or auto transmissions, and in Hatch, Saloon and Sports Tourer body styles. The Unlimited option also adds blue Brembo logo on the car’s front brake callipers and a newly-designed tachometer and speedometer, showing higher increments.

“For those owners who enjoy driving on the continent, the Unlimited option lets them experience the Insignia VXR’s true top speed, combined with the peerless stability and secure handling that only an all-wheel-drive chassis can offer,” said Stuart Harris, Vauxhall’s Group Product Manager. Following last month’s presentation of the Opel Insignia OPC Unlimited, Vauxhall introduced its own version of the performance sedan with the VXR moniker featuring the de-restricted package. The Unlimited option removes the standard Insignia VXR’s 155mph (250 km/h) restrictor, allowing Vauxhall’s range-topper to exploit its all-wheel-drive chassis and 325HP turbocharged 2.8-litre V6 engine to the full topping out at 170mph (274 km/h).