BMW has its M, Mercedes-Benz has its AMG, Audi has its RS, and Jaguar has its R. The standard XF model is already powerful, but add a supercharger and high-tech suspension gear, and the car becomes truly track-worthy.
The XFR gets quad rear pipes to vent exhaust from its massive powerplant. Its underpinnings include what Jaguar calls an Active Rear Differential, which pushes power to the outside wheel aggressively in a turn.
Jaguar uses this innovative dial shifter, which rises up from the console when the engine is fired up. Other buttons around the shifter control dynamic mode, turn off stability control, and activate a speed limiter.