Porsche · Two-seaters · Gasoline
Porsche 718: MPG and annual fuel cost, 2025
The Porsche 718 was last rated in the data for model year 2025, at 24 MPG combined, the most efficient of the 7 two-seaters rated that year.
- 24MPG combined1st of 7 in class
- $3,400a year in fuel1st of 7 in class
- 375g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is the most efficient of the 5 gasoline two-seaters rated that year. The median of that narrower group is 14 MPG, the same as for all of them together.
Across every class it is tied for 12th of 24 gasoline models, in the lower half.
In its class, just behind it is the Maserati MC20 at 18 MPG.
Fuel cost and CO2
The file prices the fuel for its most efficient version at about $3,400 a year, assuming 15,000 miles a year with 55% of them in the city and premium gasoline at $5.48 per gallon. That is $2,450 less than the two-seaters median of $5,850.
Tailpipe CO2 is 375 g/mile, 244 g/mile below the two-seaters median of 619.
Rated versions
In the city the most efficient version is rated 21 and on the highway 27, 6 better on the open road. 14 versions are rated for 2025. The most efficient, 718 Boxster: 2.0 L, 4 cyl, Automatic (AM-S7), RWD, gets 24 MPG; the least efficient listed, 718 Spyder RS: 4.0 L, 6 cyl, Automatic (AM-S7), RWD, gets 16 MPG, a gap of 8 MPG. With the file's assumptions that gap is worth about $1,750 a year in fuel.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| 718 Boxster: 2.0 L, 4 cyl, Automatic (AM-S7), RWD | 24 | 21 | 27 | $3,400 | 375 |
| 718 Cayman: 2.0 L, 4 cyl, Automatic (AM-S7), RWD | 24 | 21 | 27 | $3,400 | 375 |
| 718 Boxster S: 2.5 L, 4 cyl, Automatic (AM-S7), RWD | 22 | 19 | 25 | $3,750 | 410 |
| 718 Boxster: 2.0 L, 4 cyl, Manual 6-spd, RWD | 22 | 20 | 25 | $3,750 | 409 |
| 718 Cayman S: 2.5 L, 4 cyl, Automatic (AM-S7), RWD | 22 | 19 | 25 | $3,750 | 410 |
| 718 Cayman: 2.0 L, 4 cyl, Manual 6-spd, RWD | 22 | 20 | 25 | $3,750 | 409 |
| 718 Boxster GTS: 4.0 L, 6 cyl, Automatic (AM-S7), RWD | 21 | 19 | 24 | $3,900 | 418 |
| 718 Boxster S: 2.5 L, 4 cyl, Manual 6-spd, RWD | 21 | 19 | 24 | $3,900 | 423 |
| 718 Cayman GTS: 4.0 L, 6 cyl, Automatic (AM-S7), RWD | 21 | 19 | 24 | $3,900 | 418 |
| 718 Cayman S: 2.5 L, 4 cyl, Manual 6-spd, RWD | 21 | 19 | 24 | $3,900 | 423 |
| 718 Boxster GTS: 4.0 L, 6 cyl, Manual 6-spd, RWD | 19 | 17 | 24 | $4,350 | 458 |
| 718 Cayman GTS: 4.0 L, 6 cyl, Manual 6-spd, RWD | 19 | 17 | 24 | $4,350 | 458 |
| 718 GT4 RS: 4.0 L, 6 cyl, Automatic (AM-S7), RWD | 16 | 15 | 19 | $5,150 | 544 |
| 718 Spyder RS: 4.0 L, 6 cyl, Automatic (AM-S7), RWD | 16 | 14 | 19 | $5,150 | 551 |
Year by year
The Porsche 718 is in the data for 6 of the 8 model years from 2019 to 2026. Its best combined rating went from 19 in 2020 to 24 MPG in 2025, up 5 MPG. The number of rated versions grew from 2 to 14. Fuel cost for the best version is $3,400 in the latest data against $4,350 in 2020, although the file applies today's fuel prices to every model year, so that change comes from the rating, not from prices.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2025 | 14 | 24 | 16 | $3,400 | 375 | 18 |
| 2024 | 14 | 24 | 16 | $3,400 | 375 | 18.5 |
| 2023 | 21 | 24 | 16 | $3,400 | 375 | 17.5 |
| 2022 | 20 | 24 | 19 | $3,400 | 375 | 18 |
| 2021 | 20 | 24 | 19 | $3,400 | 375 | 18 |
| 2020 | 2 | 19 | 19 | $4,350 | 473 | 18 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Maserati MC20 | Gasoline | 18 | $4,550 | 2025 |
| Ferrari SF90 | Plug-in hybrid | 17 | $4,850 | 2025 |
| Lamborghini Revuelto | Hybrid | 12 | $6,850 | 2025 |
| Bugatti Mistral | Gasoline | 9 | $9,150 | 2025 |
Compare and rank
Rankings: Two-seaters.
Data: US EPA and DOE, as prepared in methods and data.