BMW 1 Series (2015) is 290 mm (11.42 inch) longer and 30 mm (1.18 inch) wider than Chevrolet Sonic (Hatchback) (2014).
Chevrolet Sonic (Hatchback) (2014) is 85 mm (3.35 inch) higher, 150 kg (331 lbs) lighter and has 24 liters (0.85 ft3) bigger cargo space than BMW 1 Series (2015).