RC:

Well, a short real life comparison here (Autobahn, full throttle whenever possible): 

Tesla S P100D - 170 km range

Huracan Performante - 350 km range

GLC 63 S AMG - 280 km range

Well... 

Real life with the BMW 840d:

Autobahn, 124km/h average speed, Munich-Venice-Munich = 1040km without refueling

I wanted to test what’s possible, boring drive, but impressive fuel consumption (5,6l/100km)