BMW 8 Series (G14) (2019) is 709 mm (27.91 inch) longer, 85 mm (3.35 inch) wider, 36 mm (1.42 inch) higher and has 15 liters (0.53 ft3) bigger cargo space than Mercedes SLK-Class (2017).
Mercedes SLK-Class (2017) is 468 kg (1,032 lbs) lighter than BMW 8 Series (G14) (2019).