Jaguar XFR Speed Pack Debuts in Moscow

If a 510-horsepower supercharged V8 Jaguar isn't enough for you, the British automaker has announced something a little more enticing in Moscow. Acting as something of a stop-gap until the more powerful XFR-S comes along, the Speed Pack for the XFR raises the car's speed limiter from 155 mph to 174. With a recalibrated engine and eight-speed automatic gearbox, efficiency has increased by 11% and emissions down by 8%. A revised aero pack and suspension are also part of the package.