The Acura NSX is a legend in sports car circles, and after using previous North American International Auto Shows to show concept versions of a potential successor, Acura has finally revealed the production model at the 2015 Detroit auto show.The brand was tight-lipped on performance details, but it did say the NSX will be powered by an all-new twin-turbocharged V-6 engine and three electric motors when it goes on sale late this year.