Audi R8 (2014) is 148 mm (5.83 inch) wider than Mazda 3 (Hatchback) (2018).
Mazda 3 (Hatchback) (2018) is 15 mm (0.59 inch) longer, 195 mm (7.68 inch) higher, 375 kg (827 lbs) lighter and has 265 liters (9.36 ft3) bigger cargo space than Audi R8 (2014).