The Daihatsu Rocky does 25.4 mpg combined (24.4 city, 27.4 highway), which works out to about $1,512 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 1L 3-cyl does 34 mpg while 1.6L 4-cyl does 20.3 — a difference of $763 a year. Against other 4-cyl cars it sits above the average of 25.4 mpg.
Every Daihatsu Rocky engine, compared
Picking the right version of the same car often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 1L 3-cyl | 32 / 38 | 1989–1989 | $1,129 | |
| 1.3L 4-cyl | 30 / 35 | 1989–1989 | $1,200 | |
| 1.6L 4-cyl | 20 / 21.3 | 1990–1992 | $1,892 |
What that actually costs
Miles per gallon is an abstraction; the fuel bill is not. Here it is in money, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Cost per mile | $0.126 |
| Fuel per year | $1,512 |
| Fuel over five years | $7,560 |
| Against other 4-cyl cars | −$0 a year |
| EPA's own estimate | $2,590 a year |
City or highway — who is this car for
The gap between city and highway figures tells you whom the car suits. 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 | 24.4 mpg | $1,574 a year if you only drive in town |
| Highway | 27.4 mpg | $1,401 a year if you mostly commute |
| Gap | +3 mpg (12%) | Narrow — equally happy either way |
How the Rocky changed over the years
Combined figure by model year. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 1992 | 20 / 21 | 1 | $1,920 | |
| 1991 | 20 / 21 | 1 | $1,920 | |
| 1990 | 20 / 22 | 1 | $1,829 | |
| 1989 | 31 / 36.5 | 2 | $1,164 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
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- Insurance and fuel folded into 5-year cost to own
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How we count
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
Frequently asked questions
What mpg does the Daihatsu Rocky get?
25.4 mpg combined on average — 24.4 in the city and 27.4 on the highway, per EPA ratings across 1989–1992.
How much does a Daihatsu Rocky cost in fuel per year?
About $1,512 at 12,000 miles and $3.20 a gallon — roughly $7,560 over five years, or 0.126 dollars a mile.
Which Rocky engine is the most economical?
The 1L 3-cyl at 34 mpg, against 20.3 for the 1.6L 4-cyl — a difference of about $763 a year.
Is the Rocky good on fuel compared with similar cars?
Against other 4-cyl cars it sits above the average of 25.4 mpg, computed across 6877 ratings.
Are these real-world figures?
No — they are EPA laboratory ratings, the same ones on the window sticker. Real consumption depends on driving style, terrain, load and weather, and is typically a little worse.