BMW 4 Series (2015) is 564 mm (22.20 inch) longer, 53 mm (2.09 inch) wider, 80 mm (3.15 inch) higher and has 110 liters (3.88 ft3) bigger cargo space than Mercedes SLK-Class (2020).
Mercedes SLK-Class (2020) is 130 kg (287 lbs) lighter than BMW 4 Series (2015).