The baddest of the new cats is the XJR, its 400 bhp and 408 lb-ft of torque capable of taking the 3663-lb sedan from 0 to 60 mph in just 5.0 sec. Standard R running gear is 8.5 x 19s with 255/40R19 Pirelli P Zeros; optional are 20-in. alloys with 255/35Rs. Designer Ian Callum said anything smaller than 20s on this car should be illegal. To match the supercharged power, the brakes were developed with Brembo.