BMW 1 Series (2015) is 30 mm (1.18 inch) wider than Chevrolet Sonic (Sedan) (2016).
Chevrolet Sonic (Sedan) (2016) is 88 mm (3.46 inch) longer, 95 mm (3.74 inch) higher, 112 kg (247 lbs) lighter and has 62 liters (2.19 ft3) bigger cargo space than BMW 1 Series (2015).