2012 Jaguar XKR S gets 550-hp.Jaguar has today revealed the new Jaguar XKR-S, which will have its world debut at the Geneva Motor Show next month. 2012 Jaguar XKR-S is powered by a supercharged V8 engine modified developing 550PS and 680Nm of torque can be number of serious performance.2012 Jaguar XKR S gets 550-hp