BMW 3 Series Gran Turismo (2020) is 326 mm (12.83 inch) longer, 40 mm (1.57 inch) wider, 70 mm (2.76 inch) higher and has 220 liters (7.77 ft3) bigger cargo space than Chevrolet Volt (2014).
Chevrolet Volt (2014) is 14 kg (31 lbs) lighter than BMW 3 Series Gran Turismo (2020).