BMW 8 Series (G15) (2018) 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 (2014).
Chevrolet Volt (2014) is 97 mm (3.82 inch) higher and 203 kg (448 lbs) lighter than BMW 8 Series (G15) (2018).