BMW X7 (2020) is 296 mm (11.65 inch) longer, 140 mm (5.51 inch) wider, 335 mm (13.19 inch) higher and has 197 liters (6.96 ft3) bigger cargo space than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 905 kg (1,995 lbs) lighter than BMW X7 (2020).