Lamborghini Urus (2018) is 261 mm (10.28 inch) longer, 728 mm (28.66 inch) higher and has 454 liters (16.03 ft3) bigger cargo space than Porsche Cayman (2015).
Porsche Cayman (2015) is 10 mm (0.39 inch) wider and 792 kg (1,746 lbs) lighter than Lamborghini Urus (2018).
