There has been so much excitement and desire, make that need, for this juiced-up XK that Jaguar actually is rumored to be expanding the run (even though it's still only around 50). The R-S GT is a Jaguar coupe with a 5.0L V8 that puts out 550 horsepower and 502 pound-feet of torque. Jag tuned the suspension and added carbon fiber and a giant wing to make this street-legal beast even more specialized.