BMW X7 (2020) is 251 mm (9.88 inch) longer, 138 mm (5.43 inch) wider, 350 mm (13.78 inch) higher and has 280 liters (9.89 ft3) bigger cargo space than Buick Regal Sportback (2018).
Buick Regal Sportback (2018) is 713 kg (1,572 lbs) lighter than BMW X7 (2020).