It takes the place of the old V12-engined M760s which used to head the 7 Series family. It’s only right then that it uses the most powerful, power-dense electric motor that BMW has yet made. The rear motor on its own produces over 489PS (360kW) at its peak, making it 25 per cent more power dense than the motor used in the next most powerful i7.
Performance numbers are as you’d expect, pretty spectacular for what is a near-three-tonne saloon. The sprint to 62mph takes just 3.7 seconds, while the top speed is pegged at 155mph, thanks to a boost in torque to 811lb-ft (1,100nm) in M Launch Control mode. Those numbers are possible when moving too, when you put it in the temporary M Sport Boost mode.
Usually with big power and performance in an EV comes a drop in range. Happily, the i7 M70 sports excellent efficiency from its electric motors, with 303-348 miles of WLTP-rated range quoted. If things get a bit tight, Max Range mode can be activated to add up to 25 percent to the range figure.
It’s claimed BMW M has tickled the dampers, steering, all-wheel-drive and electronics for a sportier driving experience befitting the badge, though clearly, the M70 is more an extremely fast-paced cruiser.