The petrol fuel guard system helps prevent drivers filling their diesel vehicle with petrol - an increasingly common error in this age of the ultra-refined diesel engines. Land Rover's innovative new system is incorporated into the vehicle's diesel filler head and automatically activates the intervention of a mechanical shutter if a petrol nozzle is inserted, preventing petrol being dispensed into the diesel tank.

The system distinguishes between petrol and diesel nozzles because thinner unleaded petrol dispensers go deeper down the neck of the vehicle's fuel tank, thus activating the shutter.

Chief programme engineer for the 2007 model year Range Rover Vogue, Mick Cameron, says: "The new TDV8 engine in the Range Rover Vogue is so powerful and refined we feel that there is a danger, more so with this vehicle than with any we have sold in the past, of the driver mistaking the vehicle for a petrol-powered derivative - especially if the driver isn't the vehicle's regular user. Mis-fuelling is an expensive and complex problem to fix and we are delighted to be first to the market with this innovative solution."

The AA reports that in 2005, in the UK alone, over 100,000 cases of mis-fuelling were reported, with diesel vehicles being filled with petrol being by far the most common error. The associated costs are significant, often amounting to several thousand dollars if the incorrect fuel enters the engine upon starting the vehicle.

The Range Rover Vogue for 2007 comes with a host of other significant enhancements, on both the TDV8 diesel and V8 petrol derivatives, including the all-new V8 diesel engine, revised cabin design and new technologies including Terrain Response and the fuel protection system as standard.