Chevrolet Tahoe (2018) is 324 mm (12.76 inch) longer, 185 mm (7.28 inch) wider, 425 mm (16.73 inch) higher and has 954 liters (33.69 ft3) bigger cargo space than Kia Optima (2015).
Kia Optima (2015) is 996 kg (2,196 lbs) lighter than Chevrolet Tahoe (2018).