2015 head-to-head · Two-Seater
2015 Mercedes-Benz SLK-Class 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.
The 2015 Mercedes-Benz SLK-Class 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 2015 Porsche Boxster (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
- Mercedes-Benz SLK-Class
- Porsche Boxster
Side by side
| Mercedes-Benz SLK-Class | Porsche Boxster | |
|---|---|---|
| $2,279 | Your annual fuel cost | $2,370 |
| 26 MPG | Combined efficiency | 25 MPG |
| 23 MPG | City | 22 MPG |
| 32 MPG | Highway | 31 MPG |
| 342 g/mi | Tailpipe CO₂ (g/mi) | 352 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 |
| 1.8L 4-cyl turbo | Engine / motor | 2.7L 6-cyl |
| 7-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.
Mercedes-Benz SLK-Class vs Porsche Boxster across model years
- Mercedes-Benz SLK-Class
- 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 33 2015 two-seaters, the Mercedes-Benz SLK-Class ranks 8th and the Porsche Boxster 12th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Mercedes-Benz SLK-Class or the 2015 Porsche Boxster?
Measured by cost to drive, the Mercedes-Benz SLK-Class. The Mercedes-Benz SLK-Class is rated 26 MPG combined and the Porsche Boxster 25 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Mercedes-Benz SLK-Class vs. the Porsche Boxster per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,279 for the Mercedes-Benz SLK-Class and $2,370 for the Porsche Boxster.
Mercedes-Benz SLK-Class vs Porsche Boxster in other years
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