Question: what is the difference between kia optima ex and sx?
Answer: Engine Options The Optima EX is readily equipped with a 1.6L turbo I4 and seven-speed dual-clutch transmission, while the Optima SX comes with a 2.0L turbo I4. The 2.0L turbo engine also includes a six-speed automatic transmission, steering-wheel-mounted paddle shifters, and sport-tuned suspension.