Land Rover has announced an upgraded engine and transmission package for its models featuring the three-litre V6 turbodiesel engine.Both Discovery 4 and Range Rover Sport models powered by the SDV6 diesel will benefit from slight increases in engine output, accompanied by a reduction in emissions and fuel consumption.POWER GAIN, LESS FUEL PAINThe three-litre V6 turbodiesel gains eight kW to peak at 188kW (torque unchanged at 600Nm) and its CO2 footprint shrinks from 243 to 230g/km. Beyond the increase in power, the powertrain upgrade is accompanied by a drivetrain running change – both Discovery 4 and Range Rover Sport V6 models exchange their six-speed auto transmissions for the latest ZF-sourced eight-speed self-shifter, previously exclusive to the TDV8-powered premium Range Rovers.The eight-speed auto transmission heralds reconfigured switchgear (gone is the selector stick, replaced by a rotary shift selector and steering-wheel paddles) and reduces combined cycle fuel consumption, down from 9.2l/100km to 8.8l/100km.NEATEST FEATUREAside from the increase in engine power, and the new transmission's flexibility, both Discovery 4 and Range Rover Sport model ranges gain a raft of new equipment options. Range Rover Sport customers can now access dual-view touch screens for the first time, buoyed by wireless interface for the rear-seat infotainment. Disco and ‘Sport models now also feature an optional 825W Harmon Kardon sound system…Perhaps the neatest new feature is the addition (finally) of a powered tail door on the ‘Sport, operated by a button on the fascia. Right-hand drive markets are expected to receive the revised Range Rover Sport and Discovery 4 SVD6 models towards the end of the fourth quarter of 2011, though South African customers, Land Rover South Africa emphasised, won't see the eight-speed transmission upgrade due to EU5 diesel fuel requirements.