Autobiography has a lavish specification that befits its high price, with a sliding panoramic roof, more powerful Pixel LED headlights, massaging front seats, a heated steering wheel and four-zone climate control. You also get a surround-view camera, lane keep assist, adaptive cruise control with steering assist, illuminated kick plates on the door sills and, if you opt for the long-wheelbase version, a rear-seat entertainment system.

Not only is this the cheapest engine in the range, it's also our pick. It's not as quick as some of the pricier motors, but it picks up keenly from low engine speeds and is brisk enough at getting up to speed. Refinement is good, but the diesels found in the Audi Q7 and BMW X7 are both smoother and more potent.