BMW 7 Series (2014) is 511 mm (20.12 inch) longer, 104 mm (4.09 inch) wider, 15 mm (0.59 inch) higher and has 110 liters (3.88 ft3) bigger cargo space than Buick Excelle GT (2015).
Buick Excelle GT (2015) is 575 kg (1,268 lbs) lighter than BMW 7 Series (2014).