BMW 8 Series (G15) (2019) is 345 mm (13.58 inch) longer, 114 mm (4.49 inch) wider and has 120 liters (4.24 ft3) bigger cargo space than Chevrolet Volt (2020).
Chevrolet Volt (2020) is 97 mm (3.82 inch) higher and 103 kg (227 lbs) lighter than BMW 8 Series (G15) (2019).