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: this 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.

General Motor’s Holden Special Vehicles unit in Australia is following in the footsteps of Mercedes-Benz’s AMG division as well as more recently, Porsche, with the presentation of a black-themed and named special edition series based on the E Series 3 range launched last September.

Making its world debut at the 2011 Australian motorshow in Melbourne, the SV Black Edition package is offered in the ClubSport R8, Maloo R8 and ClubSport R8 Tourer, which are the sports versions of the Commodore sedan, ute, and station wagon models respectively.

General Motor’s Holden Special Vehicles unit in Australia is following in the footsteps of Mercedes-Benz’s AMG division as well as more recently, Porsche, with the presentation of a black-themed and named special edition series based on the E Series 3 range launched last September.

Making its world debut at the 2011 Australian motorshow in Melbourne, the SV Black Edition package is offered in the ClubSport R8, Maloo R8 and ClubSport R8 Tourer, which are the sports versions of the Commodore sedan, ute, and station wagon models respectively.