The Porsche 924 does 21 mpg combined (18 city, 26 highway), which works out to about $1,829 a year in fuel at $3.20 a gallon and 12,000 miles. Against other 4-cyl cars it sits below the average of 25.7 mpg.
Every Porsche 924 engine, compared
The Porsche 924 was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2.5L 4-cyl | 18 / 26 | 1987–1988 | $1,829 |
What that actually costs
The Porsche 924 burns a gallon every 21 miles, so 12,000 miles takes about 571 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.152 |
| Fuel per year | $1,829 |
| Fuel over five years | $9,145 |
| Against other 4-cyl cars | +$335 a year |
| EPA's own estimate | $2,950 a year |
City or highway — who is this car for
The Porsche 924 gives up 8 mpg the moment you leave the motorway — 26 out there against 18 in town, a 44% drop worth $656 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 18 mpg | $2,133 a year if you only drive in town |
| Highway | 26 mpg | $1,477 a year if you mostly commute |
| Gap | +8 mpg (44%) | Wide — this car dislikes traffic |
How the 924 changed over the years
Combined figure across the 2 model years the 924 was rated in, all of them at 21 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 1988 | 18 / 26 | 1 | $1,829 | |
| 1987 | 18 / 26 | 1 | $1,829 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 2 EPA ratings of the Porsche 924 — 1 engine across 1987–1988. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $2,950. Full method.
Frequently asked questions
What mpg does the Porsche 924 get?
21 mpg combined on average — 18 in the city and 26 on the highway, per EPA ratings across 1987–1988.
How much does a Porsche 924 cost in fuel per year?
About $1,829 at 12,000 miles and $3.20 a gallon — roughly $9,145 over five years, or 0.152 dollars a mile.
Which 924 engine is the most economical?
The 2.5L 4-cyl at 21 mpg.
Is the 924 good on fuel compared with similar cars?
Against other 4-cyl cars it sits below the average of 25.7 mpg, computed across 4765 ratings.
Are these real-world 924 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Porsche 924 is $2,950 against the $1,829 we compute at 12,000 miles. Expect a little worse in practice: the spread between the city and highway figures is smaller than the spread between two drivers of the same one.
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