BMW 1 Series (2015) is 30 mm (1.18 inch) wider than Chevrolet Sonic (Sedan) (2018).
Chevrolet Sonic (Sedan) (2018) is 88 mm (3.46 inch) longer, 95 mm (3.74 inch) higher, 84 kg (185 lbs) lighter and has 62 liters (2.19 ft3) bigger cargo space than BMW 1 Series (2015).