BMW Z4 vs Toyota GR Supra: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the BMW Z4 burns about $2,700 of fuel annually against $2,700 for the Toyota GR Supra. That $0 yearly gap compounds to roughly $0 over five years and $0 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 Toyota GR Supra is the stronger commuter at 25 mpg city, while the BMW Z4 pulls ahead on the interstate at 33 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 Z4 is recorded with 1 distinct engine configuration (SIDI), the Toyota GR Supra with 1 (SIDI). Across 25 recorded BMW Z4 configurations and 17 for the Toyota GR Supra, 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 Z4 is offered with Rear-Wheel Drive, the Toyota GR Supra with Rear-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 Two Seaters and Two Seaters 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 Z4 emits 312 g/mile of CO2 versus 317 g/mile for the Toyota GR Supra. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.