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Chevrolet is bringing CNG power to the Silverado HD

Chevrolet is taking CNG-powered vehicles seriously, with so many of their trucks being used in commercial fleets, so it was perhaps no surprise that we'd see a version of the 2015 Silverado HD that can be run either on gasoline or compressed natural gas before long. Chevrolet brought the 2015 Silverado 2500 HD CNG to the Chicago Auto Show, to let prospective buyers as well as the media to learn about at the savings that could be realized with this environmentally friendly setup. The HD CNG truck will offer bi-fuel capability coupled with its 6.0-liter V8 engine that's been modified with hardened valves and valve seats to run on compressed natural gas.

Porsche 911 Carrera 4 (2012) first official pictures

Porsche has a new four-wheel drive - but it's not the Macan crossover, or an SUV of any description. The new-generation 911 has had the all-paw treatment, growing wider wings and fatter tyres in the process. It's also lost around 65kg compared with the old 997 Carrera 4, and Porsche claims it's a good deal faster too.

Audi updates the R8 LMS racer for 2010

By Sam Burnett First Official Pictures 09 March 2010 11:02 Audi has started delivering updated R8 LMS cars to racing teams across Europe ahead of the new season. Built to FIA GT3 spec, the ‘evolution’ cars will be delivered by mid-April 2010. Introduced in 2009, the the R8 LMS won three championship titles and 23 wins out of 73 races in its first year.What has Audi changed on the updated R8 LMS?The updated car includes changes to the chassis and suspension, a new six-speed sequential gearbox and a revised cooling system to improve the car’s performance in high ambient temperatures.