Buick LaCrosse (2018) is 978 mm (38.50 inch) longer, 132 mm (5.20 inch) wider and has 21 liters (0.74 ft3) bigger cargo space than Chevrolet Sonic (Hatchback) (2018).
Chevrolet Sonic (Hatchback) (2018) is 45 mm (1.77 inch) higher and 353 kg (778 lbs) lighter than Buick LaCrosse (2018).