BMW 5 Series Touring (2016) is 604 mm (23.78 inch) longer, 99 mm (3.90 inch) wider, 262 mm (10.31 inch) higher and has 410 liters (14.48 ft3) bigger cargo space than Porsche 718 Cayman (2017).
Porsche 718 Cayman (2017) is 574 kg (1,265 lbs) lighter than BMW 5 Series Touring (2016).