2020 Lexus GS Series vs. 2019 Infiniti Q70

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front and rear seat shoulder belts of the Lexus GS Series 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 Q70 doesn’t offer pretensioners for the rear seat belts.

An active infrared night vision system optional on the GS Series helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera and near-infrared lights to detect heat, the system then displays the image on a monitor in the dashboard. The Q70 doesn’t offer a night vision system.

The GS Series’ 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 Q70 doesn’t offer a driver alert monitor.

Both the GS Series and the Q70 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, daytime running lights, rearview cameras, available all-wheel drive, blind spot warning systems, rear parking sensors and rear cross-path warning.

Warranty

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There are over 12 percent more Lexus dealers than there are Infiniti dealers, which makes it easier should you ever need service under the GS Series’ warranty.

Reliability

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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 GS Series’ reliability 17 points higher than the Q70.

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 Infiniti vehicles. J.D. Power ranks Lexus 8th in initial quality, above the industry average. With 11 more problems per 100 vehicles, Infiniti is ranked 19th, 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 Infiniti vehicles. J.D. Power ranks Lexus first in reliability, above the industry average. With 22 more problems per 100 vehicles, Infiniti is ranked 11th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Lexus vehicles are more reliable than Infiniti vehicles. Consumer Reports ranks Lexus first in reliability. Infiniti is ranked 6th.

Engine

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The GS Series’ 3.5 DOHC V6 produces 10 lbs.-ft. more torque (280 vs. 270) than the Q70 3.7 LUXE’s standard 3.7 DOHC V6.

As tested in Car and Driver the Lexus GS Series is faster than the Q70 3.7 LUXE 3.7 DOHC V6:

GS Series

Q70

Zero to 60 MPH

5.5 sec

5.6 sec

Zero to 100 MPH

13.6 sec

13.9 sec

5 to 60 MPH Rolling Start

5.7 sec

5.8 sec

Speed in 1/4 Mile

102 MPH

101 MPH

Fuel Economy and Range

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On the EPA test cycle the GS Series gets better fuel mileage than the Q70:

GS Series

Q70

RWD

3.5 V6/8-spd. Auto

20 city/28 hwy

18 city/25 hwy

3.7 V6/Auto

3.5 V6/8-spd. Auto

19 city/27 hwy

n/a

AWD

3.5 V6/6-spd. Auto

19 city/26 hwy

18 city/24 hwy

3.7 V6/Auto

Transmission

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An eight-speed automatic is standard on the Lexus GS Series RWD, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q70.

Brakes and Stopping

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For better stopping power the GS Series’ brake rotors are larger than those on the Q70:

GS Series

Q70

Front Rotors

13.1 inches

12.6 inches

Rear Rotors

12.2 inches

12.1 inches

The GS Series stops much shorter than the Q70:

GS Series

Q70

60 to 0 MPH

105 feet

116 feet

Motor Trend

Tires and Wheels

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The GS Series’ standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Q70’s standard 50 series tires. The GS Series F Sport’s 265/35R19 rear tires have a lower 35 series profile than the Q70’s optional 40 series tires.

Suspension and Handling

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The GS Series has standard front and rear gas-charged shocks for better control over choppy roads. The Q70’s suspension doesn’t offer gas-charged shocks.

The GS Series offers an optional 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 Q70’s suspension doesn’t offer adjustable shock absorbers.

The GS 350 handles at .94 G’s, while the Q70 5.6 LUXE AWD pulls only .84 G’s of cornering force in a Motor Trend skidpad test.

The GS 350 goes through Road and Track’s slalom 3.2 MPH faster than the Q70 5.6 LUXE (69.9 vs. 66.7 MPH).

The GS 350 executes Motor Trend’s “Figure Eight” maneuver 1.3 seconds quicker than the Q70 5.6 LUXE AWD (25.4 seconds @ .71 average G’s vs. 26.7 seconds @ .67 average G’s).

Chassis

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The GS Series is 4 inches shorter than the Q70, making the GS Series easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver, the interior of the GS 350 is quieter than the Q70 3.7 LUXE:

GS Series

Q70

70 MPH Cruising

64 dB

73 dB

Passenger Space

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The GS Series has .2 inches more front hip room, .1 inches more rear headroom, .6 inches more rear legroom and .6 inches more rear hip room than the Q70.

Cargo Capacity

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The GS Series has a much larger trunk than the Q70 (18.4 vs. 14.9 cubic feet).

A low lift-over trunk design makes loading and unloading the GS Series easier. The GS Series’ trunk lift-over height is 28 inches, while the Q70’s liftover is 29.1 inches.

To make loading and unloading groceries and cargo easier, especially for short adults, the GS Series offers an optional power trunk, which opens and closes automatically by pressing a button. The Q70 doesn’t offer a power trunk.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Lexus service is better than Infiniti. J.D. Power ranks Lexus second in service department satisfaction. With a 3% lower rating, Infiniti is ranked fourth.

Ergonomics

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The GS Series has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The Q70 doesn’t offer a remote starting system.

Unlike the driver-only memory system in the Q70, the GS Series offers an optional 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 GS Series’ 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 Q70 does not have an oil pressure gauge.

The GS 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 Q70 doesn’t offer a heads-up display.

The GS Series’ power parking brake sets with one touch and releases with one touch or automatically. The Q70’s parking brake has to released manually.

The power windows standard on both the GS Series and the Q70 have locks to prevent small children from operating them. When the lock on the GS Series is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Q70 prevents the driver from operating the other windows just as it does the other passengers.

The GS 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 Q70’s rear power window switches have to be held the entire time to open or close them fully.

Consumer Reports rated the GS Series’ headlight performance “Good,” a higher rating than the Q70’s headlights, which were rated “Fair.”

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The GS Series offers available headlight washers to keep headlight output high. The Q70 doesn’t offer headlight washers.

While driving with high beams on, sensitive light sensors standard on the GS Series detect other vehicles which could be blinded and automatically switch to low beams. The Q70 doesn’t offer automatic dimming high beams.

Economic Advantages

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Insurance will cost less for the GS Series owner. The Complete Car Cost Guide estimates that insurance for the GS Series will cost $1340 less than the Q70 over a five-year period.

According to The Car Book by Jack Gillis, the GS Series is less expensive to operate than the Q70 because it costs $38 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the GS Series than the Q70, including $66 less for a water pump, $115 less for a muffler, $83 less for front brake pads and $606 less for front struts.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Lexus GS Series will be $3341 to $15893 less than for the Infiniti Q70.

Recommendations

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/11/22

Consumer Reports® recommends both the Lexus GS Series and the Infiniti Q70, based on reliability, safety and performance.

Motor Trend performed a comparison test in its June 2012 issue and they ranked the Lexus GS 350 first. They ranked the Infiniti Q70 3.7 LUXE fourth.

The Lexus GS Series outsold the Infiniti Q70 by 26% during the 2019 model year.

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

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