This is the lightly facelifted Audi Q7 4.2 TDI. Apart from a minor visual refresh, the key changes are to the powertrains, all of which are more economical, cleaner and more powerful. The 4.2 TDI benefits more than most engines in the line-up, its output climbing from 322bhp to 335bhp. Combined fuel consumption improves by 3.0mpg to 28.5mpg and emissions drop 32g/km, to 262g/km. All Q7s now get intelligent alternators too, which usually generate their charge when the car’s coasting or braking to save fuel.