CONSISTENT PERFORMANCE: BMW X5M
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Based on the F15-model X5, the X5M version is currently the most powerful BMW available. BMW’s “go-faster” division, M GmbH, engineered the X5 to elevate it to M-status, and claims that the newcomer is ready for the racetrack, like all other M models. Powering the X5M is the latest version of BMW’s twin-turbo 4.4-litre V8, whose pair of twin-scroll turbocharger units are mounted in the cleavage of the V-block. The bespoke components include a stronger yet lighter crankshaft and a modified exhaust system.
Finely tuned by BMW M engineers, the engine is capable of maintaining the full 750Nm of torque between 2200rpm and 5000rpm, and the 575bhp of peak power between 6000rpm and 6500rpm. There are no less than 10 heat exchangers to keep things cool (or rather, at optimum temperature) for consistent performance. The 8-speed automatic transmission gets M-Logic software, which means faster shifts (up or down) and the unusual “creep-on-demand” feature – you need to prod the accelerator pedal just a little before the car starts to move.
It is a pleasure to drive such a powerful and commanding machine without having to feather the throttle when accelerating fast out of corners, especially in the wet. The rear-biased X-Drive system allows a bit of tailslide in Sport and Sport+ modes, but the electronic multi-plate centre differential is always at work, and can direct up to 100 percent torque to the front or rear as necessary. Passengers won’t be having as much fun as the driver, but they’ll have no complaints about the interior and ride comfort, while the co-driver has the added benefit of a sports seat.
