IF you ever wanted to know just how far it is possible to go with a soft-road four-wheel drive, then we suggest you take a look at the BMW 4.8is. It is expensive, it packs the most powerful punch this side of a Porsche Cayenne Turbo - yet it’s not a turbo - and it has tremendous road grip to boot. It’s quite huge inside, is appointed in a totally luxurious way, with not many options left to tick on the order form, and manages a five-star Euro NCAP safety rating. It is, really, the ultimate SUV. But you’d better be quick, or patient, because BMW only intends to bring in a trickle of these hedonistic beasts.