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The RX Series offers an optional Panoramic View Monitor to allow the driver to see objects all around the vehicle on a screen. The Ascent only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.
Both the RX Series and the Ascent have standard driver and passenger frontal airbags, front side-impact airbags, driver 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, rearview cameras, available all wheel drive, blind spot warning systems and rear cross-path warning.
The RX Series comes with a full 4-year/50,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The Ascent’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.
Lexus’ powertrain warranty covers the RX Series 1 year and 10,000 miles longer than Subaru covers the Ascent. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the Ascent ends after only 5 years or 60,000 miles.
The RX Series’ corrosion warranty is 1 year longer than the Ascent’s (6 vs. 5 years).
J.D. Power and Associates rated the RX Series first among midsize premium suvs in their 2019 Initial Quality Study. The Ascent isn’t in the top three in its category.
J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Lexus vehicles are better in initial quality than Subaru vehicles. J.D. Power ranks Lexus 8th in initial quality, above the industry average. With 23 more problems per 100 vehicles, Subaru is ranked 25th, below the industry average.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Lexus vehicles are more reliable than Subaru vehicles. J.D. Power ranks Lexus first in reliability, above the industry average. With 30 more problems per 100 vehicles, Subaru is ranked 14th.
From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Lexus vehicles are more reliable than Subaru vehicles. Consumer Reports ranks Lexus first in reliability. Subaru is ranked fourth.
The RX 350’s standard 3.5 DOHC V6 produces 35 more horsepower (295 vs. 260) than the Ascent’s 2.4 turbo 4 cyl. The RX 450h’s standard 3.5 DOHC V6 hybrid produces 48 more horsepower (308 vs. 260) than the Ascent’s 2.4 turbo 4 cyl.
As tested in Motor Trend the RX 350 3.5 DOHC V6 is faster than the Subaru Ascent:
Zero to 60 MPH
Speed in 1/4 Mile
On the EPA test cycle the RX 450h gets better fuel mileage than the Ascent CVT (31 city/28 hwy vs. 21 city/27 hwy).
Regenerative brakes improve the RX Series Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The Ascent doesn’t offer a regenerative braking system.
In heavy traffic or at stoplights the RX Series Hybrid’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. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Ascent doesn’t offer an automatic engine start/stop system.
The RX Series stops shorter than the Ascent:
60 to 0 MPH
The RX Series 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 Ascent’s suspension doesn’t offer adjustable shock absorbers.
The RX Series has vehicle speed sensitive variable-assist power steering, for low-effort parking, better control at highway speeds and during hard cornering, and a better feel of the road. The Ascent doesn’t offer variable-assist power steering.
The RX 350 handles at .79 G’s, while the Ascent Limited pulls only .78 G’s of cornering force in a Motor Trend skidpad test.
The Lexus RX Series may be more efficient, handle and accelerate better because it weighs up to about 200 pounds less than the Subaru Ascent.
The RX Series is 4.3 inches shorter than the Ascent, making the RX Series easier to handle, maneuver and park in tight spaces.
The RX Series has a larger cargo volume than the Ascent with its rear seat up (18.4 vs. 17.8 cubic feet).
Pressing a switch automatically lowers or raises the RX Series’ optional rear seats, to make changing between cargo and passengers easier. The Ascent doesn’t offer automatic folding seats.
To make loading groceries and cargo easier when your hands are full, the RX Series’ available liftgate can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The Ascent doesn’t offer a hands-free gesture to open its liftgate, forcing you to put cargo down if your hands are full.
The RX Series uses gas struts to support the hood for easier service access. The Ascent uses a prop rod to support its heavy hood. It takes two hands to open the hood and set the prop rod, the prop rod gets in the way during maintenance and service, and the prop rod could be knocked out, causing the heavy hood to fall on the person maintaining or servicing the car.
J.D. Power and Associates surveys of service recipients show that Lexus service is better than Subaru. J.D. Power ranks Lexus second in service department satisfaction. With a 52% lower rating, Subaru is ranked 19th.
The RX Series’ standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. The Ascent doesn’t offer an easy entry system.
The RX Series offers an optional heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Ascent doesn’t offer a heads-up display.
The power windows standard on both the RX Series and the Ascent have locks to prevent small children from operating them. When the lock on the RX Series is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Ascent prevents the driver from operating the other windows just as it does the other passengers.
The RX Series’ 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 Ascent’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 RX Series 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 Ascent can only operate the windows from inside the vehicle, with the ignition on.
The RX Series’ 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 Ascent’s standard manually variable intermittent wipers have to be constantly adjusted.
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 Series offers available headlight washers to keep headlight output high. The Ascent doesn’t offer headlight washers.
The RX Series’ standard outside mirrors include heating elements to clear off the mirrors for better visibility. Subaru only offers heated mirrors on the Ascent Premium/Limited/Touring.
When the RX Series is put in reverse, both rearview mirrors tilt from their original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirrors into their original positions. The Ascent’s mirrors don’t automatically adjust for backing.
The RX Series offers optional automatic dimming rear and side view mirrors which automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The Ascent offers an automatic rear view mirror, but its side mirrors don’t dim.
The RX Series is available in both front-wheel drive and four-wheel drive configurations. The Ascent doesn’t offer a two-wheel drive configuration.
According to The Car Book by Jack Gillis, the RX Series is less expensive to operate than the Ascent because it costs $164 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the RX Series than the Ascent, including $414 less for front struts.
The Lexus RX Series outsold the Subaru Ascent by over two to one during 2018.
© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.
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