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Porsche shows off 911 RSR for World Endurance Championship

Porsche is celebrating the 50th anniversary of the 911 this year with several events including the Retro Classics show in Stuttgart, Germany, an exhibit at the Porsche Museum and honored marque status at the Pebble Beach Concours d'Elegance. Porsche also went racing with the new 911 RSR in the first event of the World Endurance Championship this weekend, and has posted a clip on its YouTube channel. The 991-based Porsche 911 RSR houses a 4.0-liter flat-six making 460 hp with a new six-speed sequential transmission with paddle shifters.

Chevrolet preps a new car for NASCAR and for the showrooms

Chevrolet will replace the Impala in NASCAR with a new model that it also will sell to consumers. General Motors said the NASCAR Sprint Cup Series race car and the showroom model will closely resemble each other and will debut in 2013 as a new nameplate in the Chevy lineup. GM said it will unveil the cars later this year.

Video: Buick Invicta

General Motor's Buick brand is blossoming in China, so the automaker chose the largest Chinese Auto Show this year to unveil its latest concept: the Invicta. Unlike the Riviera concept shown in Shanghai last year, the Invicta is slated for production soon given the level of refinement we saw when we viewed the car in Beijing. And unlike some market-specific new cars unveiled at the show, the Invicta will make its way to other markets across the globe. Click on the image on the left to see a video of the development and the designers who worked on the Invicta concept car.