A Top Less Porsche | North American International Auto Show 2012 Posted by (1:49) By: Detroit Auto Show Videos Uploaded 12 years ago 3833 Views 3833 Views Share Description The top-less version of the new 911 had it's debut in Detroit. It takes 13 seconds for the electrical roof to open completely. The Stuttgart manufacturer gained 15 percent turnover-plus in the States last year and intend to add on more in 2012. The top-less will help. Tags: Please enable JavaScript to view the comments powered by Disqus.