Compare the2024 Lexus RXVS 2024 Infiniti QX55

The RX has a standard Secondary Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The QX55 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Both the RX and QX55 have rear cross-traffic warning, but the RX offers optional Parking Support Brake (automatically applies the brakes) to better prevent a collision when backing near traffic. The QX55’s Rear Cross Traffic Alert doesn’t automatically brake.

The RX’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 QX55 doesn’t offer a driver alert monitor.

Both the RX and the QX55 have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front and rear 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, available all wheel drive and around view monitors.

Side impacts caused 23% of all road fatalities in 2018, down from 29% in 2003, when the Insurance Institute for Highway Safety introduced its side barrier test. In order to continue improving vehicle safety, the IIHS has started using a more severe side impact test: 37 MPH (up from 31 MPH), with a 4180-pound barrier (up from 3300 pounds). The results of this newly developed test demonstrates that the Lexus RX is safer than the QX55:

The Lexus RX achieved a “Top Safety Pick” rating from the Insurance Institute for Highway Safety (IIHS) for the 2024 model year. This recognition was based on its impressive performance in the small overlap frontal crash test, updated side impact crash test, headlight evaluations, and pedestrian crash prevention testing. The QX55 is not a “Top Safety Pick” for 2024.

There are over 21 percent more Lexus dealers than there are Infiniti dealers, which makes it easier should you ever need service under the RX’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 Lexus RX’s reliability 18 points higher than the QX55 and the Lexus RX Hybrid is rated 19 points higher than the QX55.

J.D. Power and Associates’ 2023 Initial Quality Study of new car owners surveyed provide the statistics that show that Lexus vehicles are better in initial quality than Infiniti vehicles. J.D. Power ranks Lexus above average in initial quality. With 41 more problems per 100 vehicles, Infiniti is rated below average.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Lexus vehicles are more reliable than Infiniti vehicles. J.D. Power ranks Lexus above average in long-term dependability. With 33 more problems per 100 vehicles in the first three years of ownership, Infiniti is rated below average.

From surveys of all its subscribers, Consumer Reports’ January 2024 Auto Issue reports that Lexus vehicles are more reliable than Infiniti vehicles. Consumer Reports ranks Lexus first in overall reliability. Infiniti is ranked 13th.

The RX 350’s standard 2.4 turbo 4-cylinder produces 7 more horsepower (275 vs. 268) and 37 lbs.-ft. more torque (317 vs. 280) than the QX55’s 2.0 turbo 4-cylinder. The RX 450h+’s standard 2.5 DOHC 4-cylinder hybrid produces 36 more horsepower (304 vs. 268) than the QX55’s 2.0 turbo 4-cylinder. The RX 500h F Sport Performance’s standard 2.4 turbo 4-cylinder hybrid produces 98 more horsepower (366 vs. 268) and 126 lbs.-ft. more torque (406 vs. 280) than the QX55’s 2.0 turbo 4-cylinder.

On the EPA test cycle the RX running its gasoline engine gets better mileage than the QX55:

The RX 450h+ can travel with zero emissions for 37 miles. The QX55 can’t move without running its internal combustion engine.

Regenerative brakes improve the RX 350h/500h/450+’s fuel efficiency by converting inertia back into energy instead of wasting it. The QX55 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the RX’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 (350 only). The QX55 doesn’t offer an automatic engine start/stop system.

The RX 350’s standard fuel tank has 1.8 gallons more fuel capacity than the QX55 (17.8 vs. 16 gallons).

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Lexus RX higher (7 out of 10) than the Infiniti QX55 (6). This means the RX produces up to 1.1 pounds less smog-producing pollutants than the QX55 every 15,000 miles.

For better stopping power the RX’s brake rotors are larger than those on the QX55:

For better ride, handling and brake cooling the RX offers optional 21-inch wheels. The QX55’s largest wheels are only 20-inches.

The RX has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the QX55; 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 RX F Sport’s has front and rear gas-charged shocks for better control over choppy roads. The QX55’s suspension doesn’t offer front gas-charged shocks.

The RX offers an available driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The QX55’s suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the RX’s wheelbase is 2 inches longer than on the QX55 (112.2 inches vs. 110.2 inches).

For better handling and stability, the track (width between the wheels) on the RX is .8 inches wider in the front and 2.7 inches wider in the rear than on the QX55.

For better maneuverability, the RX 500h F Sport Performance’s turning circle is 1 foot tighter than the QX55’s (35.4 feet vs. 36.4 feet).

The RX has 1.5 inches more front legroom, 1.1 inches more front hip room, .2 inches more front shoulder room, 1.7 inches more rear headroom and 2.2 inches more rear hip room than the QX55.

The RX has a much larger cargo volume than the QX55 with its rear seat up (29.6 vs. 26.9 cubic feet).

The RX offers up to a 3500 lbs. towing capacity. The QX55 has no towing capacity.

Standard Trailer Sway Control on the RX uses the Vehicle Stability Control sensors to detect trailer sway, then uses individual brakes to counteract any swaying and help keep the tow vehicle and trailer steady. The QX55 doesn’t offer electronic trailer sway control.

J.D. Power and Associates surveys of service recipients show that Lexus service is better than Infiniti. J.D. Power ranks Lexus first in service department satisfaction. With a 35% lower rating, Infiniti is ranked 9th.

The RX’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The QX55 does not have an oil pressure gauge.

The power windows standard on both the RX and the QX55 have locks to prevent small children from operating them. When the lock on the RX is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The QX55 prevents the driver from operating the other windows just as it does the other passengers.

The RX’s standard Smart Access allow you to unlock the doors from any outside door handle, open the cargo door, and start the vehicle, all without removing the key from the pocket or purse. Infiniti Intelligent Key standard on the QX55 doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear door.

The RX’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The QX55’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The RX Luxury/500h F Sport offers available headlight washers to keep headlight output high. The QX55 doesn’t offer headlight washers.

The RX’s standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The QX55 has an automatic rear view mirror, but its side mirrors don’t dim.

The RX Premium/Luxury/F Sport has standard front air conditioned seats and the RX offers them optionally in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The QX55 doesn’t offer air-conditioned seats in the rear.

The RX Hybrid offers an optional 115-volt a/c outlet in the cargo area, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The QX55 doesn’t offer a house-current electrical outlet.

The RX Premium+/Luxury/F Sport’s optional Advanced Park can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Optional Remote Advanced Park will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The QX55 doesn’t offer an automated parking system.

The RX is available in both front-wheel drive and four-wheel drive configurations. The QX55 doesn’t offer a two-wheel drive configuration.

The RX will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the RX will retain 58.33% to 60.37% of its original price after five years, while the QX55 only retains 46.84% to 46.91%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Lexus RX will be $3641 to $9060 less than for the Infiniti QX55.

Consumer Reports® recommends the Lexus RX, based on reliability, safety and performance.

J.D. Power and Associates rated the RX first among midsize premium suvs in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The QX55 isn’t in the top three.

The Lexus RX outsold the Infiniti QX55 by over 21 to one during 2023.