2015 head-to-head · Two-Seater
2015 Alfa Romeo 4C vs Porsche 918 Spyder
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
AWD · 4.6L 8-cyl · 7-speed dual-clutch · 67 MPGe + 22 MPG
The 2015 Alfa Romeo 4C is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas and 18¢/kWh electricity, it costs about $2,116 a year to fuel (28 MPG), versus $2,259 for the 2015 Porsche 918 Spyder (67 MPGe + 22 MPG). That's roughly $143 a year, or about $717 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
- Porsche 918 Spyder
Side by side
| Alfa Romeo 4C | Porsche 918 Spyder | |
|---|---|---|
| $2,116 | Your annual fuel cost | $2,259 |
| 28 MPG | Combined efficiency | 67 MPGe + 22 MPG |
| 24 MPG | City | 68 MPGe / 20 MPG |
| 34 MPG | Highway | 66 MPGe / 24 MPG |
| — | Electricity use (kWh/100 mi) | 50 kWh |
| — | Driving range | 420 mi |
| — | All-electric range | 12 mi |
| 317 g/mi | Tailpipe CO₂ (g/mi) | 277 g/mi |
| 7/10 | EPA fuel economy score | 7/10 |
| 7/10 | EPA greenhouse gas score | 8/10 |
| — | Charge time at 240V | 3 hrs |
| Gas | Powertrain | Plug-in hybrid |
| Premium gasoline | Fuel | Premium gas + electricity |
| 1.8L 4-cyl turbo | Engine / motor | 4.6L 8-cyl |
| 6-speed dual-clutch | Transmission | 7-speed dual-clutch |
| RWD | Drivetrain | AWD |
✓ 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 Porsche 918 Spyder across model years
- Alfa Romeo 4C
- Porsche 918 Spyder
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 Alfa Romeo 4C ranks 6th and the Porsche 918 Spyder 7th for lowest fuel cost.
The powertrains differ: the Alfa Romeo 4C is a conventional gas model, while the Porsche 918 Spyder is a plug-in hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2015 Alfa Romeo 4C or the 2015 Porsche 918 Spyder?
Measured by cost to drive, the Alfa Romeo 4C. The Alfa Romeo 4C is rated 28 MPG combined and the Porsche 918 Spyder 67 MPGe + 22 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Alfa Romeo 4C vs. the Porsche 918 Spyder per year?
At 15,000 miles a year with $3.95/gal premium gas and 18¢/kWh electricity, about $2,116 for the Alfa Romeo 4C and $2,259 for the Porsche 918 Spyder.
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