BMW 4 Series (2020) is 82 kg (181 lbs) lighter than Buick Regal TourX (2020).
Buick Regal TourX (2020) is 218 mm (8.58 inch) longer, 10 mm (0.39 inch) wider, 100 mm (3.94 inch) higher and has 160 liters (5.65 ft3) bigger cargo space than BMW 4 Series (2020).