BMW 4 Series Gran Coupe (2018) is 140 mm (5.51 inch) longer, 39 mm (1.54 inch) wider and has 181 liters (6.39 ft3) bigger cargo space than Opel Ampera (2014).
Opel Ampera (2014) is 50 mm (1.97 inch) higher and 155 kg (342 lbs) lighter than BMW 4 Series Gran Coupe (2018).
