BMW 1 Series (2015) is 366 kg (807 lbs) lighter than Buick LaCrosse (2017).
Buick LaCrosse (2017) is 688 mm (27.09 inch) longer, 102 mm (4.02 inch) wider, 40 mm (1.57 inch) higher and has 65 liters (2.30 ft3) bigger cargo space than BMW 1 Series (2015).