transmission was fitted in both versions of the 4.2-litre model. Limited editions XKR Silverstone Produced in celebration of Jaguar's 2001 entry in to Formula One (F1) racing. They featured unique platinum paint finish (only available on the Silverstone XKR), specific badges and tread plates, a high-performance package with the same engine as the standard XKR, but improved transmission, steering, suspension and brakes (Brembo 4-piston brakes with aluminium callipers stopping the car from 97 km/ to 0 in ), 20-inch silver BBS wheels and a custom interior (red-stitched black leather and silver birds-eye maple wood). All possible factory options were included, with the exception of the telephone and the navigation system, which had to be ordered separately. All Silverstone cars were manufactured in calendar year 2000, the last one being a coupé for the Japanese market built on 23 December 2000. PHASE ONE: Based on the Model Year 2000 XKR. Only 100 Silverstone models were planned in Phase I. As it transpired, according to "Registre International des XKR Silverstone" these first 100 "phase one" cars totalled 102 in all, and were sold in the UK only. Phase I cars had fixed headrests and were all right-hand drive. PHASE TWO: Based on the Model Year 2001 XKR but all built in 2000. A further production run of 500 cars was planned to satisfy demand from the United States and the rest of the world. Total "Phase Two" production eventually stood at 456, giving a total of 558 'Silverstone' cars. Phase Two UK cars had separate and adjustable headrests and were available in both right and left-hand drive. XKR 100 Built to celebrate the centenary of Jaguar's founder, 500 'XKR 100' coupés and convertibles combined total were made in 2002. The XKR 100 featured all the available options and an Anthracite paint finish, Recaro seats, 20-inch BBS alloy wheels, Brembo brakes, specific dark wood dashboard panels and GPS. As it was produced only after 2001 all the engines were fitted with upgraded metal chain tensioners and water pump impellers, solving the common engine failures due to the weakness of plastic and semi-plastic tensioners. XKR Portfolio The convertible-only Portfolio models featured either red paint with matching Recaro sports seats and interior, or blue paintwork and interiors. XKR 4.2-S In Europe the 4.2-S was unveiled at the Geneva Motor Show on 1 March 2005. This was the last XK to be rolled out that was