Kia Sorento vs Lexus RX: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Kia Sorento burns about $1,650 of fuel annually against $2,100 for the Lexus RX. That $450 yearly gap compounds to roughly $2,250 over five years and $3,600 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.

City and highway economy: the Kia Sorento leads in both cycles — 39 mpg city and 36 mpg highway against 37 and 34 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.

Powertrain choice: the Kia Sorento is recorded with 4 distinct engine configurations (SIDI; Hybrid, SIDI; PHEV, SIDI & PFI), the Lexus RX with 4 (SIDI & PFI, SIDI & PFI; Hybrid, SIDI & PFI; PHEV). Across 74 recorded Kia Sorento configurations and 59 for the Lexus RX, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.

Drivetrain and class: the Kia Sorento is offered with Front-Wheel Drive, All-Wheel Drive, the Lexus RX with Front-Wheel Drive, All-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Small Sport Utility Vehicle 4WD and Small Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.

Tailpipe emissions: at their cleanest configurations the Lexus RX emits 89 g/mile of CO2 versus 105 g/mile for the Kia Sorento. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.