2016 head-to-head · Two-Seater
2016 BMW Z4 vs Porsche Cayman
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2016 BMW Z4 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,279 a year to fuel (26 MPG), versus $2,370 for the 2016 Porsche Cayman (25 MPG). That's roughly $91 a year, or about $456 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 Cayman
Side by side
| BMW Z4 | Porsche Cayman | |
|---|---|---|
| $2,279 | Your annual fuel cost | $2,370 |
| 26 MPG | Combined efficiency | 25 MPG |
| 22 MPG | City | 21 MPG |
| 32 MPG | Highway | 30 MPG |
| 345 g/mi | Tailpipe CO₂ (g/mi) | 359 g/mi |
| 6/10 | EPA fuel economy score | 6/10 |
| 6/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 2.0L 4-cyl turbo | Engine / motor | 3.4L 6-cyl |
| 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 Cayman across model years
- BMW Z4
- Porsche Cayman
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 32 2016 two-seaters, the BMW Z4 ranks 8th and the Porsche Cayman 10th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2016 BMW Z4 or the 2016 Porsche Cayman?
Measured by cost to drive, the BMW Z4. The BMW Z4 is rated 26 MPG combined and the Porsche Cayman 25 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2016 BMW Z4 vs. the Porsche Cayman per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,279 for the BMW Z4 and $2,370 for the Porsche Cayman.
BMW Z4 vs Porsche Cayman in other years
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