From Jaguar press: The Jaguar XF Supercharged and XFR are powered by a 5.0-liter direct-injection supercharged V8 engine that delivers 470 hp and 424 lb/ft of torque and can accelerate the car from zero to 60 mph in just 4.9 seconds; the XFR delivers 510 hp and 461 lb.-ft. of torque and can go from rest to 60 in just 4.7 seconds. A twin vortex system (TVS) supercharger and twin water-cooled intercoolers are efficiently packaged in the engine’s V. The XF Supercharged and XFR models share key chassis technologies for optimum handling performance: Adaptive Dynamics and Active Differential Control. The Adaptive Dynamics active damping system optimizes both handling agility and ride comfort. The system monitors body movement 100 times per second and wheel position 500 times a second and automatically increases the damping rate as the suspension approaches the limits of its travel. Adaptive Dynamics also controls wheel hop on uneven roads by rapidly varying the damping to move any wheel out of a natural bouncing frequency, benefiting ride comfort, handling and tire grip. Active Differential Control optimizes available traction at each rear wheel, improving acceleration on low-grip surfaces while enhancing cornering ability. The clutch-type differential is operated by an internal electric motor and ball-and-ramp mechanism and transmits torque to the wheel with the most traction. This differs fundamentally from conventional traction control, which uses the brakes to counteract slip after it has occurred. The XF Supercharged and XFR also share the same upgraded brakes and silver-gray calipers. The XF Supercharged and XFR are equipped with the amenities found in the XF Portfolio, plus the 440-watt Bowers & Wilkins Premium Audio Package and HD radio. Externally, the XF Supercharged stand apart with standard 20-inch Selena-style alloy wheels, quad polished exhaust tailpipes, a color-keyed lower rear valance, and a “Supercharged” trunk lid badge. The 2011 Jaguar XFR is quickly recognizable with unique 20-inch Nevis-style alloy wheels; distinct front end design with a black mesh grille (new for 2011); chrome air intakes; "Supercharged" hood louvers; four polished exhaust tailpipes; an aerodynamically functional rear spoiler and side sills, and discreet "R" badge. A special acoustic filter at the rear of the engine, tuned to “tenor C”, feeds intake sound to the cabin under hard acceleration. The XFR exclusively offers performance-focused settings for the Dynamic Stability Control, allowing the experienced driver to extract more cornering performance. The XFR features unique interior appointments, including an aluminum dashboard, satin or gloss wood veneers and twin-needle stitching on the instrument panel and doors. The XFR's multi-adjustable sports seats have power adjustable bolsters, leather map pockets and an embossed “R” logo on the seat surfaces. The lower steering wheel spoke is also leather trimmed, with an R logo. All Jaguar XF models employ an electronically controlled, fully adaptive six-speed automatic transmission with the unique cast alloy JaguarDrive Selector™ as well as the Jaguar Sequential Shift™ function operated by steering-wheel paddles. The illuminated stop/start button pulsates like a heartbeat until pressed, and as part of the XF’s “handshake” sequence, the JaguarDrive Selector rises from the center console, and the rotating dash vents silently open. When the engine is stopped, the JaguarDrive Selector lowers automatically. The transmission is designed to be maintenance-free with “filled-for-life” fluid.