2 November 2017
With more than 600bhp, the M760Li xDrive is the most powerful production BMW yet. For the time being, it's also the fastest-accelerating road car BMW has built so far.
But how does it compare with Porsche's own big-power luxury machine, the Panamera Turbo? We drive both cars on the road before heading to the test track, where we find out which is faster in a drag race.
