Shelby raffles off last 50th-anniversary Cobra

Shelby is celebrating its 50th anniversary in style, first at the Detroit auto show with a few black-and-gold Shelby Mustangs, and now at the Barrett-Jackson auction in Arizona with the last example of the 50th-anniversary Shelby Cobra. The car won't be sold to the highest bidder though; it will be raffled. Tickets cost $25 apiece or five for $100.

Alfa Romeo Zagato TZ3 Stradale

Following on from the Villa d'Este Design Concept Award-winning TZ3 Corsa, Zagato has announced the production of nine more TZ3 models. Unlike the 8C-based TZ3 Corsa, the new Stradale will be based on a Dodge Viper ACR platform and V10 drivetrain, making it the 'first American Alfa Romeo' according to Zagato. The car is said to be a tribute to Alfa Romeo and Zagato's street legal heritage, and continues the line of cars that ended with the S.Z.

Detroit Auto Show: Bentley Continental GTC Speed debuts

Bentley will complete its Speed portfolio when it introduces a freshened Continental GTC range at the Detroit auto show. Along with exterior and equipment changes, a new GTC Speed model is added with a more powerful version of the 6.0-liter twin-turbocharged W12 that churns out 600 hp and 553 lb-ft of torque for an improvement of 48 hp and 74 lb-ft over the regular GTC. The result is Bentley's most powerful convertible to date.