On topix they have the 2012 owners manual now available (Discovery 4) - The 8 speed transmission appears only to be available on the Diesel variants. Fuel consumption figures for the V8 remain the same as 2011 models (Fuel and refueling section). Pop up gear selector appears only with the 8 speed transmission (Gearbox section)
So does that mean that the 2012 LR4 will have a diesel variant available in the United States?