BMW X7 facelift engine and gearbox Powering the updated X7 in its xDrive40d guise is a new 3.0-litre twin-turbo diesel engine with 340hp and 700Nm. It might be 60hp less than the older xDrive50d, but at no point does it feel lacking in performance. A 0-100kph time of just 5.9 se...