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2015 Chevy Silverado HD and GMC Sierra HD unveiled at State Fair of Texas

Chevrolet and GMC unveiled new, 2015 heavy duty versions of their recently introduced Silverado and Sierra at -- where else? -- the Texas State Fair. Updates include new exterior and interior styling, new engines and a host of new options.

Porsche Cayenne S Diesel (2012) first pictures

Porsche has equipped its Cayenne SUV with a twin-turbo diesel engine, creating (no surprises here) the Cayenne S diesel. The 4.2-litre bi-turbo oil-burner puts out 376bhp and a rather wholesome 626lb ft of torque. That latter figures bests even the flagship petrol Cayenne Turbo: that car's twin-blown petrol V8 produces 'only' 516lb ft - and costs around £28k more than the Cayenne S Diesel.

2013 Audi A6 Allroad unveiled

2013 Audi A6 Allroad revealed Audi are busy showing off the new A4 Allroad at the Detroit Auto Show, but this morning they have revealed its big brother – the 2013 Audi A6 Allroad in Germany. Audi has only just launched the 2012 A4 Allroad – which is on show at the Detroit Auto Show as we write – but they’ve already got its big brother ready to show – the 2013 Audi A6 Allroad. Audi has taken the usual Allroad recipe for the A6 by taking the basics of the A6 Avant and making it rufty-tufy and ready for the urban jungle.