Bugatti Chiron (2016) is 178 mm (7.01 inch) wider than Kia Optima (2019).
Kia Optima (2019) is 311 mm (12.24 inch) longer, 258 mm (10.16 inch) higher, 483 kg (1,065 lbs) lighter and has 459 liters (16.21 ft3) bigger cargo space than Bugatti Chiron (2016).