Earlier seen on a trailer, the upcoming G07 BMW X7 has been spotted road testing. To recap, the X7 will be built in Spartanburg, South Carolina alongside its other X model SUV (or SAV in BMW-speak) siblings, the X3, X4, X5 and X6.

Taking aim at the Mercedes-Benz GLS and the Range Rover when it hits the road in 2018, the X7 will be built on the modular CLAR architecture which forms the basis of the G11/12 7 Series, G30 5 Series and the upcoming G20 3 Series.

Crowning the range will be a 6.6 litre twin-turbo V12 variant which produces 600 hp and 800 Nm of torque in the M760Li xDrive; comparatively, the W12 Bentley Bentayga produces 600 hp and 900 Nm from its twin-turbo petrol W12.

The upcoming X7 is also expected to share componentry with the upcoming Rolls-Royce Cullinan SUV, including its twin-turbocharged V12. Whereas Bentley has taken a petrol-and-diesel approach to powering the Bentayga SUV, it remains to be seen if the Goodwood luxury car maker will adopt a similarly varied approach, or retain the current, V12-only lineup of engines.