BMW 8 Series (G15) (2019) is 709 mm (27.91 inch) longer, 85 mm (3.35 inch) wider, 38 mm (1.50 inch) higher and has 85 liters (3.00 ft3) bigger cargo space than Mercedes SLK-Class (2014).
Mercedes SLK-Class (2014) is 369 kg (814 lbs) lighter than BMW 8 Series (G15) (2019).