Audi S4 Cabriolet
15.5 MPG The 2009 Audi S4 Cabriolet is EPA-rated at 15.5 MPG combined (13.5 city / 20 highway). Over 15,000 miles a year that is about 968 gallons, $3097 a year in fuel, or $0.206 per mile at $3.20/gal.
Across its full 2004–2009 run it averages 15.9 MPG, falling by 1.5 MPG over 6 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.161 | $1613 | $2419 | $3226 |
| $3.00/gal | $0.194 | $1935 | $2903 | $3871 |
| $3.20/gal | $0.206 | $2065 | $3097 | $4129 |
| $3.50/gal | $0.226 | $2258 | $3387 | $4516 |
| $4.00/gal | $0.258 | $2581 | $3871 | $5161 |
| $4.50/gal | $0.290 | $2903 | $4355 | $5806 |
| $5.00/gal | $0.323 | $3226 | $4839 | $6452 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2009 | 15.5 MPG | 13.5 | 20 | $4975 | 574 | 2 |
| 2008 | 15.5 MPG | 13.5 | 20 | $4975 | 574 | 2 |
| 2007 | 15.5 MPG | 13.5 | 20 | $4975 | 574 | 2 |
| 2006 | 16 MPG | 13.5 | 20 | $4800 | 555 | 2 |
| 2005 | 16 MPG | 13.5 | 20 | $4800 | 555 | 2 |
| 2004 | 17 MPG | 14.5 | 20.5 | $4550 | 525 | 2 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 229 subcompact cars models tracked here, the Audi S4 Cabriolet ranks 218 on current figures, against a class average of 24.2 MPG.
Closest more-efficient alternatives in the same class: BMW M3 Coupe (16), Ford Shelby GT350 Mustang (16), Maserati GranTurismo (16), Maserati GranTurismo Convertible (16), BMW M6 Convertible (16.5).
Tailpipe CO₂ is rated at 574 grams per mile, which works out to roughly 8.6 tonnes a year at 15,000 miles.
Questions
What MPG does the Audi S4 Cabriolet get?
The 2009 Audi S4 Cabriolet is rated at 15.5 MPG combined by the EPA — 13.5 city and 20 highway. Across all 6 model years in the database it averages 15.9 MPG, ranging from 15 to 18 depending on year and trim.
How much does a Audi S4 Cabriolet cost in fuel per year?
At 15.5 MPG and 15,000 miles a year, it burns about 968 gallons — roughly $3097 a year with fuel at $3.20 a gallon, or $0.206 per mile. The EPA's own published annual figure for the 2009 model is $4975.
Has the Audi S4 Cabriolet become more efficient over time?
No — it has actually gone backwards, from 17 MPG in 2004 to 15.5 in 2009. That usually reflects the model growing heavier, more powerful, or moving upmarket rather than the engineering getting worse.
Is the Audi S4 Cabriolet efficient for its class?
It ranks 218 of 229 in the Subcompact Cars class on current figures, against a class average of 24.2 MPG. That is 8.7 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.