Video: BMW M5 2018 review - 592bhp all-wheel drive super saloon tested

This is the new BMW M5, BMW's executive supersaloon, which has 592bhp (600hp) and, just as importantly, 4wd to put all of that power to the road, and with which to challenge the Mercedes-AMG E63. 

The M5 looks pretty subtle on the outside, and on the inside, too, but what is this 4.4-litre, V8 powered sedan, which has all of the accelerative and top speed performance of a supercar, like to drive on both road and track? Join Autocar as we find out.