BMW 5 Series Touring (2017) is 538 mm (21.18 inch) longer, 97 mm (3.82 inch) wider, 287 mm (11.30 inch) higher and has 376 liters (13.28 ft3) bigger cargo space than Porsche 718 Cayman (2020).
Porsche 718 Cayman (2020) is 564 kg (1,243 lbs) lighter than BMW 5 Series Touring (2017).