The 2011 Jaguar XKR 175 is an anniversary model which celebrates the automaker’s 75th birthday and which will be showcased at the Pebble Beach Concours d’Elegance.
The 2011 Jaguar XKR 175 price was also announced and the company said production for this limited edition model will be restricted to only 175 units, which is head to US and Canada. 
Powered by a supercharged V8 the 2011 Jaguar XKR 175 is able to spit out 510 horsepower and 461 lb-ft of torque while its top speed is limited to 174 mph. So unique elements found on this anniversary model include a revised aero package, 20 inch 10 spoke design alloys, red brake callipers, and the special ‘Ultimate Black’ body colour. 
The 2011 Jaguar XKR 175 price is 104,500 USD and only 15 exemplars out of 175 will hit the Canadian market. 
Jaguar press release :
Jaguar celebrates its 75th anniversary today with the debut of the
limited edition 2011 Jaguar XKR175 Coupe at the McCalls Motorworks
Revival at the Monterey Jet Center during the Pebble Beach Automotive
Weekend. This is the first appearance of the exclusive sports car in
North America.
The XKR175 is powered by a supercharged V8 with 510hp and 461 lb-ft of
torque and top speeds raised to an electronically-limited 174mph. To
ensure that the XKR175 remains stable at high speeds, a revised
aerodynamic package incorporates a new front air dam, new side sills, a
new rear diffuser and a larger rear spoiler providing increased balance
and a reduction in lift. New 20-inch Kasuga 10-spoke alloy wheels, red
brake calipers and Ultimate Black exterior paint adorn the car’s
Inside, door sill tread plates reading "XKR175 – 1 of 175" greet the
driver and passenger while the leather is finished in Warm Charcoal with
Cranberry stitching, all accompanied by Piano Black wood veneer.
Production of the XKR175 is limited to 175 vehicles at an MSRP of
$104,500 (including destination charge). There will be 15 Jaguar XKR175
models for the Canadian market as well.

Source: Jaguar