Lexus GS-F Rumored Again as BMW M5 Rival By Huw Evans Nov 21 2011 Share this Article Tweet In terms of engines, there are many believe that such a super sedan would need a super car engine, in this case a variation of the LFA’s 4.8-liter V10 Continue Reading... Filed under: Auto Show News Japanese Lexus Luxury Cars SedansTags: 2013 lexus gs, BMW M5 rival, Lexus, lexus lfa, Sport sedans