The Hyundai Ioniq 9 does 92.0 mpg combined (103.0 city, 81.0 highway), which works out to about $417 a year in fuel at $3.20 a gallon and 12,000 miles. Against other Electric cars it sits below the average of 99.7 mpg.
Every Hyundai Ioniq 9 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 |
|---|---|---|---|---|
| Electric | 103 / 81 | 2026–2027 | $417 |
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 | $0.035 |
| Fuel per year | $417 |
| Fuel over five years | $2,085 |
| Against other Electric cars | +$32 a year |
| EPA's own estimate | $850 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 | 103.0 mpg | $373 a year if you only drive in town |
| Highway | 81.0 mpg | $474 a year if you mostly commute |
| Gap | +-22 mpg (-21%) | Narrow — equally happy either way |
How the Ioniq 9 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 |
|---|---|---|---|---|
| 2027 | 103 / 81 | 1 | $417 | |
| 2026 | 103 / 81 | 1 | $417 |
MPG is a number. Dollars per year is the answer.
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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 Hyundai Ioniq 9 get?
92.0 mpg combined on average — 103.0 in the city and 81.0 on the highway, per EPA ratings across 2026–2027.
How much does a Hyundai Ioniq 9 cost in fuel per year?
About $417 at 12,000 miles and $3.20 a gallon — roughly $2,085 over five years, or 0.035 dollars a mile.
Which Ioniq 9 engine is the most economical?
The Electric at 92 mpg.
Is the Ioniq 9 good on fuel compared with similar cars?
Against other Electric cars it sits below the average of 99.7 mpg, computed across 540 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.