BMW 7 Series (2017) is 600 mm (23.62 inch) longer, 114 mm (4.49 inch) wider, 40 mm (1.57 inch) higher and has 215 liters (7.59 ft3) bigger cargo space than Chevrolet Volt (2017).
Chevrolet Volt (2017) is 79 kg (174 lbs) lighter than BMW 7 Series (2017).