The Range Rover Sport and Land Rover Discovery will get lower emissions and a new automatic gearbox as part of a JLR range update.
The eight-speed ZF transmission has already found its way into the revised Jaguar XF, and will help bring CO2 emissions down from 243g/km and 244g/km to 230g/km when paired with the 3.0-litre V6 diesel engine found in both models.
Despite the drop in emissions, Land Rover has also managed to give the diesel engine a boost in power, improving from 242bhp to 252bhp. This has the knock-on effect of reducing the pair's acceleration to 60mph by 0.3 and 0.2 seconds for the Range Rover and the Discovery respectively.
In addition to the engine refinements and the new gearbox, the two cars are getting a selection of new equipment including an upgraded stereo on both.
The Range Rover Sport also gets an HSE Luxury pack that brings specification close to that of the Supercharged model and comes with 20-inch alloy wheels, extra leather detailing, a heated steering wheel and adaptive cruise control for an additional £3,065.
The two upgraded cars are on sale from October, with the Range Rover Sport costing from £48,795 and the Discovery 4 priced from £37,995.