Frankfurt Motor Show: Let's take an objective look! BMW v. Porsche

Until now, Porsche has built the hottest SUVs in the shape of the Cayenne. But now, BMW is going head-to-head with Porsche by introducing the X5 M and, most notably, the X6 M. BMW wants the top-spot by offering more performance, even if it's just by a small margin, 555bhp as against the 550bhp of the hottest Cayenne, the Turbo S. And not just on paper: the BMW X6 series SUV already had an excellent chassis, but in the M version, it has been sharpened up and made even sportier. Porsche won't like it one bit. On a winding stretch of road, the X6 M can show the Cayenne Turbo S a clean pair of heels.