Kia K4 Engine Specifications
The 2026 Kia K4 is offered with 1.6L–2.0L engines in 4-cylinder form, per EPA fuel-economy records.
Latest model year (2026):
The Kia K4 is available with 4 2.0L and Automatic (AV-S1) (Front-Wheel Drive).
Kia K4 Engine Specs — All Years
| Year | Trim | Cylinders | Displ. | Transmission | Drive | Fuel Type | Vehicle Class |
|---|---|---|---|---|---|---|---|
| 2026Config 1 of 5 | Auto (AV-S1), 4 cyl, 2.0 L | 4 | 2.0L | Automatic (AV-S1) | Front-Wheel Drive | Regular Gasoline | Midsize Cars |
| 2026Config 2 of 5 | Auto (AV-S1), 4 cyl, 2.0 L | 4 | 2.0L | Automatic (AV-S1) | Front-Wheel Drive | Regular Gasoline | Midsize Cars |
| 2026Config 3 of 5 | Auto (AV-S1), 4 cyl, 2.0 L | 4 | 2.0L | Automatic (AV-S1) | Front-Wheel Drive | Regular Gasoline | Large Cars |
| 2026Config 4 of 5 | Auto (S8), 4 cyl, 1.6 L | 4 | 1.6L | Automatic (S8) | Front-Wheel Drive | Regular Gasoline | Large Cars |
| 2026Config 5 of 5 | Auto (S8), 4 cyl, 1.6 L | 4 | 1.6L | Automatic (S8) | Front-Wheel Drive | Regular Gasoline | Midsize Cars |
| 2025Config 1 of 3 | Auto (AV-S1), 4 cyl, 2.0 L | 4 | 2.0L | Automatic (AV-S1) | Front-Wheel Drive | Regular Gasoline | Midsize Cars |
| 2025Config 2 of 3 | Auto (AV-S1), 4 cyl, 2.0 L | 4 | 2.0L | Automatic (AV-S1) | Front-Wheel Drive | Regular Gasoline | Midsize Cars |
| 2025Config 3 of 3 | Auto (S8), 4 cyl, 1.6 L | 4 | 1.6L | Automatic (S8) | Front-Wheel Drive | Regular Gasoline | Midsize Cars |
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.
Kia K4 data analysis
How Kia K4 engine displacement varies
Across 8 configurations recorded for the 2025 through 2026 Kia K4, engine displacement runs from 1.6 litres to 2 litres. The strongest figure belongs to the 2026 Kia K4 (SIDI) at 1.6 litres, and the weakest to the 2025 car (Auto (AV-S1), 4 cyl, 2.0 L) at 2 litres — a spread of 20%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Kia K4 would be misleading.
What changed for 2026
Average engine displacement for the 2026 Kia K4 is 1.8 litres, against 1.9 litres for the 2025 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 Kia K4 data
This page lists every 2025 through 2026 Kia K4 record we hold for this measurement — 8 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.
Configurations behind these Kia K4 numbers
The 2025 through 2026 Kia K4 entries here cover the variants Auto (AV-S1), 4 cyl, 2.0 L, SIDI and with DMS. 2026 is the busiest model year in the record with 5 separate measured configurations, which is why a single quoted engine displacement figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.
Where these Kia K4 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 Kia K4 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.
Frequently Asked Questions About K4 Engine Specs
What engine does the Kia K4 have?
The Kia K4 is available with 4 cylinder engines ranging up to 2.0L. Transmission and drivetrain options vary by trim. See the full table above.
Is the Kia K4 available with all-wheel drive?
Check the drive column in the table above to see available drivetrain configurations.
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