Compare the2023 Infiniti Q50VS 2023 Kia Stinger

The Q50 Red Sport 400’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Stinger doesn’t offer pre-crash pretensioners.

Over 200 people are killed each year when backed over by motor vehicles. The Q50 has standard Back-up Collision Intervention that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The Stinger doesn’t offer backup collision prevention brakes.

Both the Q50 and the Stinger have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and available all wheel drive.

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 Infiniti Q50 is safer than the Kia Stinger:

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

The Q50’s corrosion warranty is 2 years and unlimited miles longer than the Stinger’s (7/unlimited vs. 5/100,000).

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Q50’s reliability 44 points higher than the Stinger.

From surveys of all its subscribers, Consumer Reports’ January 2021 Auto Issue reports that Infiniti vehicles are more reliable than Kia vehicles. Consumer Reports ranks Infiniti 4 places higher in reliability than Kia.

The Q50 Red Sport 400’s standard 3.0 turbo V6 produces 32 more horsepower (400 vs. 368) than the Stinger GT2’s standard 3.3 turbo V6.

As tested in Car and Driver the Q50 Red Sport 400 is faster than the Stinger GT2 3.3 turbo V6:

On the EPA test cycle the Q50 gets better mileage than the Stinger:

The Q50 has 4.1 gallons more fuel capacity than the Stinger (20 vs. 15.9 gallons), for longer range between fill-ups.

For better stopping power the Q50 Red Sport 400’s front brake rotors are larger than those on the Stinger:

The Q50’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs standard on the Stinger GT-Line are solid, not vented.

For better traction, the Q50 Red Sport 400’s tires are larger than the largest tires available on the Stinger (F:245/40R19 & R:265/35R19 vs. F:225/40R19 & R:255/35R19).

The Q50 has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The Stinger doesn’t offer vehicle monitored tire inflation.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the Q50 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Stinger doesn’t offer run-flat tires.

The Q50 Sport’s optional drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Stinger doesn’t offer drift compensation steering.

To almost totally eliminate engine vibration in the passenger area, the Q50 has liquid-filled engine mounts. The liquid helps further dampen engine harshness. The Stinger uses conventional solid rubber engine mounts.

The Q50 has 6.2 cubic feet more passenger volume than the Stinger (100 vs. 93.8).

The Q50 has 1.2 inches more front headroom, 1.9 inches more front legroom, .3 inches more front shoulder room and 1.3 inches more rear shoulder room than the Stinger.

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the Q50 offers cargo security. The Stinger’s hatchback body style, non-lockable folding seat and non-lockable remote release defeat cargo security.

J.D. Power and Associates surveys of service recipients show that Infiniti service is better than Kia. J.D. Power ranks Infiniti 9th in service department satisfaction (above the industry average). With a 28% lower rating, Kia is ranked 26th.

The Q50’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Stinger’s rear power window switches have to be held the entire time to open or close them fully.

If the windows are left open on the Q50 the driver can close them all at the outside door handle. On a hot day the driver can lower the windows at the outside door handle or from a distance using the keyless remote. The driver of the Stinger can only close the windows from inside the vehicle, with the ignition on.

Consumer Reports rated the Q50’s headlight performance “Good,” a higher rating than the Stinger’s headlights, which were rated “Fair.”

The Q50 has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the Stinger.

Consumer Reports® recommends both the Infiniti Q50 and the Kia Stinger, based on reliability, safety and performance.

The Infiniti Q50 outsold the Kia Stinger by 13% during the 2021 model year.