2017 head-to-head · Two-Seater
2017 Alfa Romeo 4C vs Mercedes-Benz SL-Class
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
RWD · 1.8L 4-cyl turbo · 6-speed dual-clutch · 28 MPG
The 2017 Alfa Romeo 4C 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 $2,576 for the 2017 Mercedes-Benz SL-Class (23 MPG). That's roughly $460 a year, or about $2,300 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
- Alfa Romeo 4C
- Mercedes-Benz SL-Class
Side by side
| Alfa Romeo 4C | Mercedes-Benz SL-Class | |
|---|---|---|
| $2,116 | Your annual fuel cost | $2,576 |
| 28 MPG | Combined efficiency | 23 MPG |
| 24 MPG | City | 20 MPG |
| 34 MPG | Highway | 28 MPG |
| 317 g/mi | Tailpipe CO₂ (g/mi) | 383 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 |
| 1.8L 4-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 6-speed dual-clutch | Transmission | 9-speed automatic |
| 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.
Alfa Romeo 4C vs Mercedes-Benz SL-Class across model years
- Alfa Romeo 4C
- Mercedes-Benz SL-Class
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 29 2017 two-seaters, the Alfa Romeo 4C ranks 6th and the Mercedes-Benz SL-Class 10th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2017 Alfa Romeo 4C or the 2017 Mercedes-Benz SL-Class?
Measured by cost to drive, the Alfa Romeo 4C. The Alfa Romeo 4C is rated 28 MPG combined and the Mercedes-Benz SL-Class 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2017 Alfa Romeo 4C vs. the Mercedes-Benz SL-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,116 for the Alfa Romeo 4C and $2,576 for the Mercedes-Benz SL-Class.
Alfa Romeo 4C vs Mercedes-Benz SL-Class in other years
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