The latest version of Jaguar's XKR is a terrific car to drive, but the quality of some of its smaller parts and materials remain a matter of complaint. The Portfolio package aims to address the issue, remedying its performance a bit more at the same time, when price still remains higher above the XKR's already-hefty window sticker. Looking same from the outside, the only change in every XKR Portfolio is the paint color celestial black, and each will be dressed up with polished aluminum side vents and with twenty-inch Cremona wheels.

Lying behind the front wheels is a six-piston brake-calipers badge with a large "R" in red that squeeze down on the biggest brakes in Jaguar’s racing history. At 15.7 inches at the front, the XKR Portfolio's discs are 1.7 inches in diameter larger than the regular XKR. Four piston calipers pinch 13.8 inch discs in the rear. The new system, developed at the Nürburgring, features XKR's 420 horsepower, 4.2-liter supercharged V-8 engine.                                         

The Portfolio option inside the cabin brings a new shift knob and door handles, contrast stitching, and leather-trimmed floor-mats. The new veneers, engine-spun aluminum and American walnut, are also being offered. This is also Jaguar's first production application of a Bowers & Wilkins speaker system, following on the heels of a similar system in the C-XF concept car. The 525-watt-system uses Dolby Pro Logic II surround sound and Kevlar mid-range speakers designed specifically for the XK's cabin. This ‘portfolio-package’ in XKR would be available from March 2007 onwards.