Compare the2025 Hyundai SonataVS 2024 Infiniti Q50

For enhanced safety, the front and rear seat shoulder belts of the Hyundai Sonata have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Infiniti Q50 doesn’t offer pretensioners for its rear seat belts.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Sonata are reminded to check the back seat if they opened the rear door before starting out. The Q50 doesn’t offer a back seat reminder.

The Hyundai Sonata has a standard driver’s side knee airbag mounted low on the dashboard. The knee airbag helps prevent the driver from sliding under the seatbelts or the main frontal airbag; this keeps the driver better positioned during a collision for maximum protection. A knee airbag also helps keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Q50 doesn’t offer knee airbags.

With its standard Forward Collision-Avoidance Assist, the Hyundai Sonata is better at preventing collisions with pedestrians than the Infiniti Q50, according to the Insurance Institute for Highway Safety:

In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the Hyundai Sonata 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 Infiniti Q50 has not been tested.

The Sonata’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Q50 doesn’t offer a driver alert monitor.

Both the Sonata and the Q50 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, 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 Hyundai Sonata (Built after November 2024) 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 Q50 is not even a standard “Top Safety Pick” for 2025.

The Sonata comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The Q50’s 4-year/60,000-mile basic warranty expires 1 year sooner.

Hyundai’s powertrain warranty covers the Sonata 4 years and 30,000 miles longer than Infiniti covers the Q50. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the Q50 ends after only 6 years or 70,000 miles.

There are over 4 times as many Hyundai dealers as there are Infiniti dealers, which makes it much easier should you ever need service under the Sonata’s warranty.

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 Sonata’s reliability 13 points higher than the Q50.

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that Hyundai vehicles are better in initial quality than Infiniti vehicles. J.D. Power ranks Hyundai third in initial quality, above the industry average. With 25 more problems per 100 vehicles, Infiniti is ranked 14th.

J.D. Power and Associates’ 2024 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Hyundai vehicles are more reliable than Infiniti With 21 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Hyundai higher than Infiniti.

The Sonata N Line’s standard 2.5 turbo 4-cylinder produces 16 lbs.-ft. more torque (311 vs. 295) than the Q50’s standard 3.0 turbo V6.

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

In heavy traffic or at stoplights the Sonata SE’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. The Q50 doesn’t offer an automatic engine start/stop system.

To lower fuel costs and make buying fuel easier, the Hyundai Sonata uses regular unleaded gasoline. The Q50 requires premium, which can cost on average about 84.9 cents more per gallon.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Hyundai Sonata higher (4 to 6 out of 10) than the Infiniti Q50 (3). This means the Sonata produces up to 23.4 pounds less smog-producing pollutants than the Q50 every 15,000 miles.

An eight-speed automatic (SMG) is standard on the Hyundai Sonata, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q50.

The Sonata offers an available sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Q50 doesn’t offer an SMG or a conventional manual transmission.

The Sonata N Line’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The Q50 doesn’t offer launch control.

The Sonata stops shorter than the Q50:

The Sonata has a standard space-saver spare (not available on N Line) so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the Q50; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.

The Sonata has standard front and rear gas-charged shocks for better control over choppy roads. The Q50’s suspension doesn’t offer gas-charged shocks.

For better handling and stability, the average track (width between the wheels) on the Sonata is 3.3 inches wider in the front and 2.5 inches wider in the rear than the average track on the Q50.

For better maneuverability, the Sonata’s turning circle is .8 feet tighter than the Q50’s (35.9 feet vs. 36.7 feet). The Sonata’s turning circle is 1.5 feet tighter than the Q50 AWD’s (35.9 feet vs. 37.4 feet).

The Hyundai Sonata may be more efficient, handle and accelerate better because it weighs about 500 pounds less than the Infiniti Q50.

Because it has more passenger and cargo room, the EPA rates the Sonata a Large car, while the Q50 is rated a Mid-size.

The Sonata has 4.4 cubic feet more passenger volume than the Q50 (104.4 vs. 100).

The Sonata has .5 inches more front headroom, 1.6 inches more front legroom, 1.4 inches more front hip room, 1.2 inches more front shoulder room, 1 inch more rear headroom and 1.9 inches more rear hip room than the Q50.

The Sonata has a much larger trunk than the Q50 (15.6 vs. 13.5 cubic feet).

To make loading groceries and cargo easier when your hands are full, the Sonata’s trunk can be opened just by waiting momentarily behind the back bumper, leaving your hands completely free. The Q50 doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

The Sonata’s power parking brake sets with one touch and releases with one touch or automatically. The Q50’s parking brake has to be released manually.

The power windows standard on both the Sonata and the Q50 have locks to prevent small children from operating them. When the lock on the Sonata is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Q50 prevents the driver from operating the other windows just as it does the other passengers.

The Insurance Institute for Highway Safety (IIHS) conducts detailed tests on headlights for their range both straight ahead and in curves and to be certain they don’t exceed acceptable amounts of glare to oncoming drivers. The Sonata’s headlights were rated “Good” by the IIHS, while the Q50’s headlights are rated “Marginal.”

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Hyundai Sonata (except SE) offers an optional wireless phone charging system (Qi) in the front center console. The Q50 doesn’t offer wireless personal charging.

J.D. Power and Associates rated the Sonata second among midsize cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Q50 isn’t in the top three in its category.

The Hyundai Sonata outsold the Infiniti Q50 by almost 12 to one during 2024.