Jaguar has launched a new optional Speed Pack for the Jaguar XFR sports saloon. Cars equipped with the pack will benefit from a higher top speed, drivetrain and suspension tweaks and a subtle bodykit.

The XFR's gearbox and 503bhp 5.0 V8 unit have been recalibrated and the speed limiter reset. These tweaks raise the car's top speed, previously limited to 155mph, to 174mph.

Cars equipped with the Speed Pack are distinguished by a new rear wing and front splitter.

The Speed Pack is available at a price of £2750, on top of the XFR's retail price which starts from £65,380.

James Taylor