BMW 5 Series Touring (2020) is 614 mm (24.17 inch) longer, 94 mm (3.70 inch) wider, 97 mm (3.82 inch) higher and has 420 liters (14.83 ft3) bigger cargo space than Porsche 718 Cayman (2017).
Porsche 718 Cayman (2017) is 460 kg (1,014 lbs) lighter than BMW 5 Series Touring (2020).