BMW 8 Series (G14) (2020) is 204 mm (8.03 inch) longer and 124 mm (4.88 inch) wider than Mercedes CLA-Class (2017).
Mercedes CLA-Class (2017) is 99 mm (3.90 inch) higher, 448 kg (988 lbs) lighter and has 120 liters (4.24 ft3) bigger cargo space than BMW 8 Series (G14) (2020).