BMW 1 Series (2015) is 30 mm (1.18 inch) wider than Chevrolet Sonic (Sedan) (2014).
Chevrolet Sonic (Sedan) (2014) is 88 mm (3.46 inch) longer, 95 mm (3.74 inch) higher, 122 kg (269 lbs) lighter and has 62 liters (2.19 ft3) bigger cargo space than BMW 1 Series (2015).