Kia Optima Specs, Engines & Dimensions (2005–2008) — Second Generation
When choosing a second-generation Kia Optima sedan, look beyond the version badge: the same engine-size label can accompany different fuels and transmissions, making the full powertrain description worth checking.
Your Kia Optima engine choice affects everyday driving: diesels generally deliver useful pulling power at lower revs. Examples include front-wheel-drive 2.0 MT sedans with gasoline or diesel engines, plus a diesel 2.0 AT. The manual gives you control over gear changes, while the automatic reduces your workload in stop-start traffic.