US super-saloon the Cadillac CTS-V takes on the mighty BMW M5, more videos hi-res pics and full details at http://www.autocar.co.uk/News/NewsArticle/Cadillac-CTS/233878/

Watch as Hennessey’s 645 horsepower HPE700 Camaro runs the dyno. Powered by the ZR1’s supercharged LS9 powerplant, this ultimate Camaro will only be produced in limited quantities.

Footage courtesy of Hennessey Performance Engineering

Audi TT RS meets its ancestor, the Audi Quattro. More videos, car tests, news and high-res pictures at autocar.co.uk

Take a look behind the scenes with Jay Leno and pro race driver Justin Bell as they preview the Green Car Challenge debuting on The Jay Leno Show

Ride along for a hot lap at Laguna Seca in Jaguar’s supercharged cat, the XFR, as part of Motor Trend’s 2009 Best Driver’s Car competition. For the full story, check out the October issue of Motor Trend magazine.

A quick-fire round-up of the highlights of the 2009 Frankfurt motor show. See hi-res pictures and more details of every car launch at http://www.autocar.co.uk/News/NewsArticle/AllCars/242808/

Ride along for a hot lap at Laguna Seca in Nissan’s track-ready Nismo 370Z as part of Motor Trend’s 2009 Best Driver’s Car competition. For the full story, check out the October issue of Motor Trend magazine.

Video blog from the 2009 Frankfurt motor show. High-res pictures and full car details at http://www.autocar.co.uk/News/NewsArticle/AllCars/242808/

Video blog from the Frankfurt motor show 2009. High-res pictures and full car details at http://www.autocar.co.uk/News/NewsArticle/AllCars/242808/