One of the easiest decisions for the designers of the 2012 Porsche 911 Cabrio was where to launch it: the 2012 North American International Auto Show in Detroit. It was a no-brainer for the Germany-based automaker because the United States loves the 911 Cabrio more than any other country, where sales have continue to surge. The all-new seventh generation is scheduled to hit the showrooms in the spring with almost 4 more inches in its wheel base, a lower overall height, and construction composed almost entirely of lightweight aluminum steel composite. Prospective owners have their choice of either a 3.4 liter or 3.8 liter six-cylinder engine that is capable of pumping out 350-horsepower or 400-horsepower, respectively, through a first of its kind seven-speed automatic or manual transmission. Check out more advanced looks of the 2012 Porsche 911 Cabrio after the jump ahead of the North American International Auto Show, which is scheduled to open its doors on January 9th.