BMW 7 Series (2020) is 533 mm (20.98 inch) longer, 104 mm (4.09 inch) wider, 4 mm (0.16 inch) higher and has 110 liters (3.88 ft3) bigger cargo space than Buick Excelle GT (2015).
Buick Excelle GT (2015) is 790 kg (1,742 lbs) lighter than BMW 7 Series (2020).