Alfa Romeo Giulia (2019) is 13 mm (0.51 inch) wider and 61 kg (134 lbs) lighter than Kia Optima (2015).
Kia Optima (2015) is 212 mm (8.35 inch) longer, 29 mm (1.14 inch) higher and has 60 liters (2.12 ft3) bigger cargo space than Alfa Romeo Giulia (2019).
