BMW X5 vs Subaru Forester: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Subaru Forester burns about $1,750 of fuel annually against $2,900 for the BMW X5. That $1,150 yearly gap compounds to roughly $5,750 over five years and $9,200 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 Subaru Forester leads in both cycles — 35 mpg city and 34 mpg highway against 24 and 31 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.

Powertrain choice: the BMW X5 is recorded with 4 distinct engine configurations (SIDI & PFI; Mild Hybrid, SIDI; PHEV, SIDI; Mild Hybrid), the Subaru Forester with 3 (SIDI, SIDI; Hybrid, 2.5). Across 61 recorded BMW X5 configurations and 29 for the Subaru Forester, 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 BMW X5 is offered with All-Wheel Drive, Rear-Wheel Drive, the Subaru Forester with 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 Standard 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 BMW X5 emits 130 g/mile of CO2 versus 255 g/mile for the Subaru Forester. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.