BMW 5 Series Gran Turismo (2018) is 356 mm (14.02 inch) longer, 69 mm (2.72 inch) wider, 5 mm (0.20 inch) higher and has 125 liters (4.41 ft3) bigger cargo space than Buick Excelle GT (2015).
Buick Excelle GT (2015) is 474 kg (1,045 lbs) lighter than BMW 5 Series Gran Turismo (2018).