Hyundai i40 (2015) is 195 mm (7.68 inch) longer, 19 mm (0.75 inch) wider, 15 mm (0.59 inch) higher and has 86 liters (3.04 ft3) bigger cargo space than Mazda 3 (Sedan) (2016).
Mazda 3 (Sedan) (2016) is 377 kg (831 lbs) lighter than Hyundai i40 (2015).