SL 63 AMG vs BMW M6 vs Bentley GTC vs Jaguar XFR-S
20 Sep 2013, 16:06 UTC · By: Alex Oagana / The Mercedes-Benz SL 63 AMG is technically in a niche of its own, without a single direct competitor, as there are no other roadsters with a retractable hardtop and over 500 hp in any other car manu...