BMW 8 Series (G15) (2019) is 251 mm (9.88 inch) longer, 132 mm (5.20 inch) wider and has 89 liters (3.14 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2014).
Mercedes C-Class (Coupe) (2014) is 89 mm (3.50 inch) higher and 219 kg (483 lbs) lighter than BMW 8 Series (G15) (2019).