Infiniti QX80 vs Jeep Grand Cherokee: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Jeep Grand Cherokee burns about $2,650 of fuel annually against $4,200 for the Infiniti QX80. That $1,550 yearly gap compounds to roughly $7,750 over five years and $12,400 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 Jeep Grand Cherokee leads in both cycles — 23 mpg city and 30 mpg highway against 16 and 20 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.

Powertrain choice: the Infiniti QX80 is recorded with 4 distinct engine configurations (SIDI, SIDI; MDPV, SIDI; MDPV (Curb Weight >6000 lbs)), the Jeep Grand Cherokee with 4 (SIDI, 3.6, SIDI; PHEV). Across 30 recorded Infiniti QX80 configurations and 87 for the Jeep Grand Cherokee, 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 Infiniti QX80 is offered with 4-Wheel Drive, Rear-Wheel Drive, the Jeep Grand Cherokee with Rear-Wheel Drive, All-Wheel Drive, 4-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 Standard Sport Utility Vehicle 4WD and Standard 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 Jeep Grand Cherokee emits 177 g/mile of CO2 versus 504 g/mile for the Infiniti QX80. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.