Kia Optima (2017) is 1193 kg (2,630 lbs) lighter than Rolls-Royce Cullinan (2019).
Rolls-Royce Cullinan (2019) is 486 mm (19.13 inch) longer, 140 mm (5.51 inch) wider, 359 mm (14.13 inch) higher and has 50 liters (1.77 ft3) bigger cargo space than Kia Optima (2017).