BMW 1 Series (2014) is 200 kg (441 lbs) lighter than Buick Regal Sportback (2019).
Buick Regal Sportback (2019) is 540 mm (21.26 inch) longer, 114 mm (4.49 inch) wider, 44 mm (1.73 inch) higher and has 110 liters (3.88 ft3) bigger cargo space than BMW 1 Series (2014).