BMW 8 Series (G14) (2020) is 336 mm (13.23 inch) longer, 114 mm (4.49 inch) wider and has 50 liters (1.77 ft3) bigger cargo space than Chevrolet Volt (2017).
Chevrolet Volt (2017) is 99 mm (3.90 inch) higher and 212 kg (467 lbs) lighter than BMW 8 Series (G14) (2020).