It’s interesting that manufacturers are finding ways of improving CO2 figures, which involve adding gears to a vehicle’s transmission. Land Rover has announced 2012 model changes which in the case of the Range Rover Sport sees the 3.0-litre SDV6 diesel engine receive a power boost from 245bhp to 256bhp, but more importantly, the CO2 emissions from the engine have been reduced by over 5%, down from 243g/km to 230g/km. And these improvements are due in part to the new eight-speed automatic gearbox, the ZH 8HP70. This same engine/gearbox combination is available on the 2012 Discovery 4, which results in a similar lowering of emissions. These engines are fitted with a diesel particulate filter which Land Rover claims make them the cleanest diesel engines on the market.