BMW 8 Series (G16) (2019) is 384 mm (15.12 inch) longer and 118 mm (4.65 inch) wider than Opel Astra Sports Tourer (2020).
Opel Astra Sports Tourer (2020) is 128 mm (5.04 inch) higher, 419 kg (924 lbs) lighter and has 100 liters (3.53 ft3) bigger cargo space than BMW 8 Series (G16) (2019).
