2019 head-to-head · Two-Seater

2019 BMW Z4 vs Porsche Boxster

MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.

Swap sides
✓ Cheaper to run
$2,116/ year to fuel
28 MPG

RWD · 2.0L 4-cyl turbo · 8-speed automatic · 28 MPG

✓ Cheaper to run
$2,370/ year to fuel
25 MPG

The 2019 BMW Z4 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,116 a year to fuel (28 MPG), versus $2,370 for the 2019 Porsche Boxster (25 MPG). That's roughly $254 a year, or about $1,270 over five years.

Your numbers

Change these to match your driving and local prices. Every figure and chart on this page updates.

Fuel cost over 10 years

  • BMW Z4
  • Porsche Boxster

Side by side

BMW Z4Porsche Boxster
$2,116 Your annual fuel cost $2,370
28 MPG Combined efficiency 25 MPG
25 MPG City 22 MPG
32 MPG Highway 29 MPG
321 g/mi Tailpipe CO₂ (g/mi) 353 g/mi
6/10 EPA fuel economy score 5/10
6/10 EPA greenhouse gas score 5/10
Gas Powertrain Gas
Premium gasoline Fuel Premium gasoline
2.0L 4-cyl turbo Engine / motor 2.0L 4-cyl turbo
8-speed automatic Transmission 7-speed dual-clutch
RWD Drivetrain RWD

✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.

BMW Z4 vs Porsche Boxster across model years

  • BMW Z4
  • Porsche Boxster

Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.

How they differ

Among 34 2019 two-seaters, the BMW Z4 ranks 5th and the Porsche Boxster 9th for lowest fuel cost.

Frequently asked questions

Which is more fuel-efficient, the 2019 BMW Z4 or the 2019 Porsche Boxster?

Measured by cost to drive, the BMW Z4. The BMW Z4 is rated 28 MPG combined and the Porsche Boxster 25 MPG (EPA, most efficient configuration of each).

How much does it cost to fuel the 2019 BMW Z4 vs. the Porsche Boxster per year?

At 15,000 miles a year with $3.95/gal premium gas, about $2,116 for the BMW Z4 and $2,370 for the Porsche Boxster.

BMW Z4 vs Porsche Boxster in other years

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