What is it?
The Q7 e-tron uses a large six-cylinder turbodiesel engine mated to an electric motor that’s integrated into the transmission, the claim being that this powertrain will manage a combined fuel economy of 156.9mpg and emit only 48g/km of carbon dioxide.
That’s officially, at least. You’d have to ensure a substantial proportion of your mileage was undertaken in the car’s electric-only mode to achieve anything like those figures, so the powertrain’s worth is – as ever with PHEVs – going to depend on your driving habits.
Audi has been clever with the execution of this diesel-electric powertrain. The heat pump, for example, recycles that of the engine to warm the cabin without draining the battery. The car is also able to ‘coast’, the engine and motor being deactivated in the absence of any throttle input and offers haptic feedback through the pedal if it thinks you’re being a tad leaden-footed.