2019 Genesis G90 vs. 2019 Acura RLX

Detailed Review, Specifications & Comparison

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For enhanced safety, the front and rear seat shoulder belts of the Genesis G90 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 Acura RLX doesn’t offer pretensioners for the rear seat belts.

The G90’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 RLX doesn’t offer a driver alert monitor.

Both the G90 and the RLX have standard driver and passenger frontal airbags, front side-impact airbags, driver knee 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.

For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, its standard front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the G90 its highest rating: “Top Pick Plus” for 2018, a rating granted to only 28 vehicles tested by the IIHS. The RLX was last qualified as only a “Top Pick” in 2017.


The G90 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes free 24-hour roadside assistance. The RLX’s 4-year/50,000-mile basic warranty expires 1 year and 10,000 miles sooner.

Genesis’ powertrain warranty covers the G90 4 years and 30,000 miles longer than Acura covers the RLX. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the RLX ends after only 6 years or 70,000 miles.

The G90’s corrosion warranty is 2 years longer than the RLX’s (7 vs. 5 years).

Genesis pays for scheduled maintenance on the G90 for 3 years and 36,000 miles. Genesis will pay for oil changes, lubrication and any other required maintenance. Acura doesn’t pay scheduled maintenance for the RLX.

There are over 30 percent more Genesis dealers than there are Acura dealers, which makes it easier should you ever need service under the G90’s warranty.


To reliably start during all conditions and help handle large electrical loads, the G90 has a standard 950-amp battery. The RLX’s 550-amp battery isn’t as powerful.

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 G90’s reliability 20 points higher than the RLX.

J.D. Power and Associates rated the G90 first among large premium cars in their 2018 Initial Quality Study. The RLX isn’t in the top three.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Genesis vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Genesis first in initial quality, above the industry average. With 31 more problems per 100 vehicles, Acura is ranked 20th, below the industry average.


The G90 3.3T’s standard 3.3 turbo V6 produces 55 more horsepower (365 vs. 310) and 104 lbs.-ft. more torque (376 vs. 272) than the RLX’s standard 3.5 SOHC V6. The G90 3.3T’s 3.3 turbo V6 produces 35 lbs.-ft. more torque (376 vs. 341) than the RLX Sport Hybrid’s standard 3.5 SOHC V6 hybrid. The G90 5.0’s standard 5.0 DOHC V8 produces 43 more horsepower (420 vs. 377) and 42 lbs.-ft. more torque (383 vs. 341) than the RLX Sport Hybrid’s standard 3.5 SOHC V6 hybrid.

Fuel Economy and Range

The G90 has 6.8 gallons more fuel capacity than the RLX Sport Hybrid’s standard fuel tank (21.9 vs. 15.1 gallons), for longer range between fill-ups. The G90 has 3.4 gallons more fuel capacity than the RLX’s standard fuel tank (21.9 vs. 18.5 gallons).

Brakes and Stopping

For better stopping power the G90’s brake rotors are larger than those on the RLX:


G90 3.3T

G90 5.0


RLX Sport Hybrid

Front Rotors

14.2 inches

14.8 inches

12.3 inches

13 inches

Rear Rotors

13.4 inches

13.4 inches

12.2 inches

12.2 inches

The G90’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the RLX are solid, not vented.

The G90 stops shorter than the RLX:





60 to 0 MPH

117 feet

119 feet

Motor Trend

Tires and Wheels

For better traction and acceleration, the G90 has larger rear tires than the RLX (275/40R19 vs. 245/40R19).

Suspension and Handling

The G90 has a standard 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. The RLX’s suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the G90’s wheelbase is 12.2 inches longer than on the RLX (124.4 inches vs. 112.2 inches).

The G90’s front to rear weight distribution is more even (51% to 49%) than the RLX’s (57% to 43%). This gives the G90 more stable handling and braking.

The G90 3.3T AWD handles at .85 G’s, while the RLX pulls only .80 G’s of cornering force in a Motor Trend skidpad test.

The G90 3.3T AWD executes Motor Trend’s “Figure Eight” maneuver 1.2 seconds quicker than the RLX (26.1 seconds @ .72 average G’s vs. 27.3 seconds @ .64 average G’s).

For better maneuverability, the G90’s turning circle is 1.3 feet tighter than the RLX’s (39.2 feet vs. 40.5 feet).

Passenger Space

Because it has more passenger and cargo room, the EPA rates the G90 a Large car, while the RLX is rated a Mid-size.

The G90 has 11.1 cubic feet more passenger volume than the RLX (113.2 vs. 102.1).

The G90 has 3.5 inches more front headroom, 4 inches more front legroom, .6 inches more front hip room, 1.1 inches more rear headroom, .5 inches more rear hip room and .9 inches more rear shoulder room than the RLX.

For enhanced passenger comfort on long trips the G90 5.0’s rear seats recline. The RLX’s rear seats don’t recline.

Cargo Capacity

The G90 has a larger trunk than the RLX (15.7 vs. 14.9 cubic feet).

To make loading and unloading groceries and cargo easier when your hands are full, just waiting momentarily behind the back bumper can open the G90’s power trunk, leaving your hands completely free. The G90’s power trunk can also be opened or closed by pressing a button. The RLX doesn’t offer a power or hands-free opening trunk.

Servicing Ease

The engine in the G90 is mounted longitudinally (North-South), instead of sideways, as in the RLX. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.


Unlike the driver-only memory system in the RLX, the G90 has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The power windows standard on both the G90 and the RLX have locks to prevent small children from operating them. When the lock on the G90 is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The RLX prevents the driver from operating the other windows just as it does the other passengers.

To help drivers see further while navigating curves, the G90 has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The RLX doesn’t offer cornering lights.

The G90 has standard front air-conditioned seats and the G90 5.0 also has them in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The RLX doesn’t offer air-conditioned seats in the rear.

The G90 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 is only available on the RLX Sport Hybrid.


Consumer Reports® recommends the Genesis G90, based on reliability, safety and performance. The Acura RLX isn't recommended.

The Genesis G90 outsold the Acura RLX by 71% during the 2018 model year.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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