The 2015 Range Rover and Range Rover Sport gain a series of updates for the new model year, including a new system – All Terrain Progress Control – aimed at reducing driver workload in off-road conditions.

The ATPC system can be thought of as cruise control for off-road use.

It allows the driver to set a desired speed from 1mph to 19mph and leave the vehicle’s systems to achieve and maintain that speed by optimising traction.

Land Rover say the system is particularly useful in challenging terrain where a low constant speed is needed, such as rock crawling, and ATPC works in both forward and reverse gears.

ATPC is available on Range Rover TDV6 and Range Rover Sport SDV6 models, plus all V8 Supercharged models with dual-range transmission and Terrain Response 2.  Hybrid models won’t feature the system, however.

Other changes for 2015 include a new ball-bearing single turbocharger for the 3.0-litre TDV6 engine, replacing the previous twin-turbo set-up which, when coupled with other changes yield an 8.5% improvement in fuel economy while maintaining peak power and torque of 258PS and 600Nm.

Range Rover Sport SDV6 models continue to use the twin-turbo configuration, but detail changes increase power by 14PS to 306PS and torque by 100Nm to 700Nm, while economy improves by 7% to 40.4 mpg with CO2 emissions of 185 g/km.

Also new is a head-up display (HUD) that projects speed, gear position, cruise control settings and navigation instructions on to the windscreen.