Kia Optima (2015) is 1755 kg (3,869 lbs) lighter than Rolls-Royce Cullinan (2020).
Rolls-Royce Cullinan (2020) is 486 mm (19.13 inch) longer, 299 mm (11.77 inch) wider, 364 mm (14.33 inch) higher and has 50 liters (1.77 ft3) bigger cargo space than Kia Optima (2015).