BMW 6 Series Gran Coupe (2016) is 109 mm (4.29 inch) longer and 33 mm (1.30 inch) wider than Buick Regal Sportback (2020).
Buick Regal Sportback (2020) is 63 mm (2.48 inch) higher, 238 kg (525 lbs) lighter and has 11 liters (0.39 ft3) bigger cargo space than BMW 6 Series Gran Coupe (2016).
