Against 283 other 4-cyl cars rated 1990–1992, the Rocky trails their 23.7 mpg average by 3.7 mpg, about $300 a year.
Every Daihatsu Rocky engine, compared
The Daihatsu Rocky 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 |
|---|---|---|---|---|
| 1.6L 4-cyl | 20 / 21.3 | 1990–1992 | $1,892 |
What that actually costs
| Measure | Value |
|---|---|
| Cost per mile (1992) | $0.160 |
| Fuel per year | $1,920 |
| Fuel over five years | $9,600 |
| Against other 4-cyl cars, 1990–1992 | +$300 a year |
| EPA's own estimate | $3,050 a year |
City or highway — who is this car for
The 1992 Daihatsu Rocky gives up 1 mpg in town: 21 on the highway against 20 in the city, $91 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (1992) | 20 mpg | $1,920 a year if you only drive in town |
| Highway | 21 mpg | $1,829 a year if you mostly commute |
| Gap | +1 mpg (5%) | Narrow — equally happy either way |
How the Rocky changed over the years
The Rocky peaked in 1990 at 21 mpg (20 city, 22 highway) and was at its thirstiest in 1992 at 20 — 1 mpg apart, or $91 a year in fuel between buying one year and the other. The 1992 car does 20.
| 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 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 3 EPA ratings of the Daihatsu Rocky — 1 engine across 1990–1992. 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 $3,050. Full method.
Frequently asked questions
What mpg does the 1992 Daihatsu Rocky get?
20 mpg combined, 20 city and 21 highway, per EPA. Across every year since 1990 the Rocky has averaged 20.3 mpg.
Is the 1992 Rocky more efficient than the 1991?
About the same: 20 against 20 mpg combined.
Which Rocky year has the best gas mileage?
The 1990, at 21 mpg combined (20 city, 22 highway).
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