Hyundai Ioniq 9 Fuel Economy (MPG)

Name: Hyundai Ioniq 9 MPG & Fuel Economy
Creator: AutoSpecData
License: https://creativecommons.org/licenses/by/4.0/

What is the real-world gas mileage of a 2027 Hyundai Ioniq 9?

The 2027 Hyundai Ioniq 9 gets up to 92 MPG combined (103 city / 81 highway) in EPA testing.

Latest model year (2027):

The Hyundai Ioniq 9 gets up to 92 MPG combined (103 city / 81 highway) in the Auto (A1) trim.

Verifiedfueleconomy.gov · Verified August 11, 2026

Overview MPG Engine Specs Fuel Cost Transmission Drivetrain Vehicle Class Maintenance Dimensions Curb Weight EV Range

Hyundai Ioniq 9 MPG — All Years

Year	Trim	Engine	Fuel	City (MPG)	Hwy (MPG)	Combined (MPG)
2027Config 1 of 3	Auto (A1)	—	Electricity	91	79	85
2027Config 2 of 3	Auto (A1)	—	Electricity	98	78	88
2027Config 3 of 3	Auto (A1)	—	Electricity	103	81	92
2026Config 1 of 3	Auto (A1)	—	Electricity	103	81	92
2026Config 2 of 3	Auto (A1)	—	Electricity	98	78	88
2026Config 3 of 3	Auto (A1)	—	Electricity	91	79	85

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Hyundai Ioniq 9 data analysis

How Hyundai Ioniq 9 combined fuel economy varies

Across 6 configurations recorded for the 2026 through 2027 Hyundai Ioniq 9, combined fuel economy runs from 85 MPG to 92 MPG. The strongest figure belongs to the 2026 Hyundai Ioniq 9 (Auto (A1)) at 92 MPG, and the weakest to the 2027 car (Auto (A1)) at 85 MPG — a spread of 8%. The narrow spread means any year of the Hyundai Ioniq 9 in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.

What changed for 2027

Average combined fuel economy for the 2027 Hyundai Ioniq 9 is 88.3 MPG, against 88.3 MPG for the 2026 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.

How to read this Hyundai Ioniq 9 data

This page lists every 2026 through 2027 Hyundai Ioniq 9 record we hold for this measurement — 6 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Where these Hyundai Ioniq 9 figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Hyundai Ioniq 9 record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speed	EPA highway spec	AutoSpecData adjusted MPG	Fuel you lose
60 mph	81 MPG	81 MPG	0%
65 mph	81 MPG	73.9 MPG	9%
70 mph	81 MPG	67.6 MPG	17%
75 mph	81 MPG	61.9 MPG	24%
80 mph	81 MPG	56.7 MPG	30%

Our Real-World Speed MPG Adjuster re-scales the Hyundai Ioniq 9 EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About Ioniq 9 MPG

What is the MPG of the Hyundai Ioniq 9?

The Hyundai Ioniq 9 gets up to 92 MPG combined (103 city / 81 highway) in the 2027 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Hyundai Ioniq 9 trim has the best fuel economy?

The Auto (A1) trim offers the best combined fuel economy at 92 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.