Audi, Audi RS7, Detroit Auto Show, LuxuryJanuary 15, 2013<September 12, 2014 2014 Audi RS 7 Sportback live photos: 2013 NAIAS by John Ringwald The Audi RS 7 Sportback features a twin turbo charged 4.0l DOHC V8 with 560 hp at 5600 rpm and 516 lb ft from…