Compare the2025 Kia K4VS 2025 Acura Integra

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Environmental Friendliness
Brakes and Stopping
Suspension and Handling
Passenger Space
Cargo Capacity
Ergonomics
Recommendations

Safety

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In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the Kia K4 achieved a “Acceptable” rating - the second highest possible - for its performance in forward collision warning and automatic braking systems, demonstrating its excellent capabilities in preventing collisions. The Acura Integra has not been tested.

The K4 GT-Line Turbo offers an optional Surround View Monitor to allow the driver to see objects all around the vehicle on a screen. The Integra only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

Both the K4 and Integra have rear cross-traffic warning, but the K4 LXS/EX/GT-Line has Rear Cross-Traffic Collision-Avoidance Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The Integra’s Rear Cross Traffic Monitor doesn’t automatically brake.

Both the K4 and the Integra have standard driver and passenger frontal airbags, front and rear side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors and available blind spot warning systems.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Kia K4 is safer than the Acura Integra:

	K4	Integra
	Driver
STARS	5 Stars	5 Stars
Neck Injury Risk	16.7%	27%
Neck Stress	129 lbs.	191 lbs.
Leg Forces (l/r)	147/158 lbs.	287/574 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The Insurance Institute for Highway Safety does 40 MPH moderate front offset crash tests on new cars. In this updated test, results indicate that the K4 is safer than the Integra:

	K4	Integra
Overall Evaluation	GOOD	ACCEPTABLE
Structure	GOOD	GOOD
	Driver Injury Measures
Head/Neck Rating	GOOD	GOOD
Head Injury Criterion	168	289
Chest Rating	GOOD	GOOD
Thigh/hip Rating	GOOD	GOOD
Leg/foot Rating	GOOD	GOOD
Restraints	GOOD	GOOD
	Rear Passenger Injury Measures
Head/Neck Rating	GOOD	GOOD
Thigh Rating	GOOD	GOOD
Restraints	GOOD	MARGINAL

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Kia K4 is safer than the Acura Integra:

	K4	Integra
	Front Seat
STARS	5 Stars	5 Stars
Abdominal Force	196 lbs.	226 lbs.
	Into Pole
STARS	5 Stars	5 Stars
Max Damage Depth	11 inches	12 inches
HIC	178	236
Spine Acceleration	42 G’s	45 G’s

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The Kia K4 (Built after January 2025) has achieved the Insurance Institute for Highway Safety’s (IIHS) highest rating of “Top Safety Pick Plus” for the 2025 model year. This distinction is based on its exceptional performance in IIHS’ rigorous battery of safety tests. Specifically, it earned a “Good” rating in the latest, more stringent moderate overlap front crash test, a “Good” result in the updated side impact test, and a “Good” score in the revised pedestrian crash prevention test. The Integra is only a standard “Top Safety Pick” for 2025.

Warranty

The K4 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The Integra’s 4-year/50,000-mile basic warranty expires 1 year or 10,000 miles sooner.

Kia’s powertrain warranty covers the K4 4 years and 30,000 miles longer than Acura covers the Integra. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the Integra ends after only 6 years or 70,000 miles.

There are almost 3 times as many Kia dealers as there are Acura dealers, which makes it much easier should you ever need service under the K4’s warranty.

Reliability

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that Kia vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Kia fourth in initial quality, above the industry average. With 30 more problems per 100 vehicles, Acura is ranked 18th.

J.D. Power and Associates’ 2024 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Kia vehicles are more reliable than Acura vehicles. J.D. Power ranks Kia above average in long-term dependability. With 3 more problems per 100 vehicles in the first three years of ownership, Acura is rated below average.

Engine

As tested in Motor Trend the K4 GT-Line Turbo 1.6 turbo 4-cylinder is faster than the Acura Integra 1.5 turbo 4-cylinder (automatics tested):

	K4	Integra
Zero to 60 MPH	7.1 sec	7.6 sec
Quarter Mile	15.5 sec	15.9 sec

Fuel Economy and Range

On the EPA test cycle the K4 gets better mileage than the Integra:

			MPG
K4
	Auto	LX 2.0 DOHC 4-cyl.	30 city/40 hwy
		2.0 DOHC 4-cyl.	29 city/39 hwy
Integra
	Manual	1.5 turbo 4-cyl.	26 city/36 hwy
		2.0 turbo 4-cyl.	21 city/28 hwy
	Auto	1.5 turbo 4-cyl.	30 city/37 hwy
		A-Spec 1.5 turbo 4-cyl.	29 city/36 hwy

To lower fuel costs and make buying fuel easier, the Kia K4 uses regular unleaded gasoline. The Integra requires premium for maximum efficiency, which can cost on average about 84.9 cents more per gallon.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Kia K4 higher (6 out of 10) than the Acura Integra (5 to 6). This means the K4 produces up to 6.9 pounds less smog-producing pollutants than the Integra every 15,000 miles.

Brakes and Stopping

The K4 stops shorter than the Integra:

	K4	Integra
70 to 0 MPH	173 feet	178 feet	Car and Driver
60 to 0 MPH	120 feet	123 feet	Motor Trend

Suspension and Handling

The K4 GT-Line Turbo executes Motor Trend’s “Figure Eight” maneuver quicker than the Integra A-Spec Technology (26.6 seconds @ .68 average G’s vs. 27.2 seconds @ .63 average G’s).

For better maneuverability, the K4’s turning circle is 2.9 feet tighter than the Integra’s (35.2 feet vs. 38.1 feet). The K4’s turning circle is 4.5 feet tighter than the Integra Type S’ (35.2 feet vs. 39.7 feet).

Passenger Space

The K4 has 2.9 cubic feet more passenger volume than the Integra (98.7 vs. 95.8).

The K4 has .4 inches more front headroom, .9 inches more rear headroom, .6 inches more rear legroom and 3 inches more rear hip room than the Integra.

Cargo Capacity

To make loading groceries and cargo easier when your hands are full, the K4’s trunk can be opened just by waiting momentarily behind the back bumper, leaving your hands completely free. The Integra doesn’t offer a hands-free gesture to open its liftgate, forcing you to put cargo down if your hands are full.

Ergonomics

The power windows standard on both the K4 and the Integra have locks to prevent small children from operating them. When the lock on the K4 is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Integra prevents the driver from operating the other windows just as it does the other passengers.

Optional air-conditioned seats in the K4 GT-Line keep the driver and front passenger comfortable and take the sting out of hot seats in Summer. The Integra doesn’t offer air-conditioned seats.

Both the K4 and the Integra offer rear vents. For greater rear passenger comfort, the K4 GT-Line Turbo has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The Integra doesn’t offer rear air conditioning vents, only heat vents.

With standard voice command, the K4 GT-Line offers the driver hands free control of the radio and the navigation computer by simply speaking. The Integra doesn’t offer a voice control system.

Compared to the Acura Integra, the Kia K4 eliminates the need for separate garage door openers and associated risks of losing, breaking, or having dead batteries with its optional integrated Homelink® universal remote controlled from the rear view mirror.

Compared to traditional radio, the Kia K4’s standard SiriusXM satellite radio provides an unmatched listening experience. Its extensive coverage guarantees consistent, crystal-clear reception across the continental U.S., and access to over 100 channels dedicated to a multitude of genres, including music, news, sports, talk shows, and comedy, many with only limited commercial breaks. Satellite radio costs extra on the Integra and is only offered on the Integra A-Spec Technology/Type S.

Recommendations

The Kia K4 outsold the Acura Integra by 14% during 2024.

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