BMW 2 Series vs Subaru Legacy: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Subaru Legacy burns about $2,050 of fuel annually against $2,450 for the BMW 2 Series. That $400 yearly gap compounds to roughly $2,000 over five years and $3,200 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 versus highway split: the Subaru Legacy is the stronger commuter at 27 mpg city, while the BMW 2 Series pulls ahead on the interstate at 39 mpg highway. If most of your driving is stop-and-go traffic the city figure is the one to weigh; for long-distance highway mileage the reverse is true, and the two vehicles effectively swap places depending on how you drive.

Powertrain choice: the BMW 2 Series is recorded with 3 distinct engine configurations (SIDI & PFI; Mild Hybrid, SIDI, SIDI & PFI), the Subaru Legacy with 3 (SIDI, 2.5, 3.6). Across 93 recorded BMW 2 Series configurations and 16 for the Subaru Legacy, 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 2 Series is offered with Rear-Wheel Drive, All-Wheel Drive, Front-Wheel Drive, the Subaru Legacy 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 Subcompact Cars and Midsize Cars 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 2 Series emits 279 g/mile of CO2 versus 295 g/mile for the Subaru Legacy. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.