Audi S3 (2015) is 4 mm (0.16 inch) longer and 58 mm (2.28 inch) wider than Chevrolet Sonic (Sedan) (2016).
Chevrolet Sonic (Sedan) (2016) is 126 mm (4.96 inch) higher, 427 kg (941 lbs) lighter and has 137 liters (4.84 ft3) bigger cargo space than Audi S3 (2015).
