Alfa Romeo Giulia (2018) is 198 mm (7.80 inch) longer, 191 mm (7.52 inch) higher, 151 kg (333 lbs) lighter and has 351 liters (12.40 ft3) bigger cargo space than Audi R8 (2015).
Audi R8 (2015) is 71 mm (2.80 inch) wider than Alfa Romeo Giulia (2018).