BMW 5 Series Touring (2017) is 96 mm (3.78 inch) longer, 38 mm (1.50 inch) wider, 102 mm (4.02 inch) higher and has 90 liters (3.18 ft3) bigger cargo space than Buick Regal Sportback (2019).
Buick Regal Sportback (2019) is 315 kg (694 lbs) lighter than BMW 5 Series Touring (2017).