2020 Lexus LS Series vs. 2019 Infiniti Q70

Detailed Review, Specifications & Comparison

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Safety

© 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

For enhanced safety, the front and rear seat shoulder belts of the Lexus LS 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.

The LS Series has standard Secondary Collision Brake, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Q70 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.

The LS 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 LS 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 and around view monitors.

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 LS Series’ warranty.

Reliability

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The battery on the LS Series is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the LS Series’ battery 20 to 30 degrees cooler, its life is increased by years. The Q70’s battery is in the hot engine compartment.

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 LS Series’ reliability 23 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 LS 500h’s standard 3.5 DOHC V6 hybrid produces 24 more horsepower (354 vs. 330) than the Q70 3.7 LUXE’s standard 3.7 DOHC V6. The LS 500’s standard 3.4 turbo V6 produces 25 lbs.-ft. more torque (442 vs. 417) than the Q70 5.6 LUXE’s standard 5.6 DOHC V8.

As tested in Car and Driver the LS 500 3.4 turbo V6 is faster than the Q70 3.7 LUXE 3.7 DOHC V6:

LS Series

Q70

Zero to 60 MPH

5.1 sec

5.6 sec

Zero to 100 MPH

12.7 sec

13.9 sec

Quarter Mile

13.7 sec

14.1 sec

Speed in 1/4 Mile

104 MPH

101 MPH

Fuel Economy and Range

© 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

On the EPA test cycle the LS 500h gets better fuel mileage than the Q70:

LS Series

Q70

RWD

3.5 V6/10-spd. Auto

25 city/33 hwy

18 city/25 hwy

3.7 V6/Auto

AWD

3.5 V6/10-spd. Auto

23 city/31 hwy

18 city/24 hwy

3.7 V6/Auto

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

LS Series

Q70

RWD

V6/Auto

n/a

18 city/25 hwy

3.7 V6/Auto

3.4 turbo V6/10-spd. Auto

19 city/30 hwy

16 city/24 hwy

5.6 V8/Auto

AWD

V6/Auto

n/a

18 city/24 hwy

3.7 V6/Auto

3.4 turbo V6/10-spd. Auto

18 city/27 hwy

16 city/23 hwy

5.6 V8/Auto

Regenerative brakes improve the LS Series Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The Q70 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the LS 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 Q70 doesn’t offer an automatic engine start/stop system.

The LS Series’ standard fuel tank has 1.7 gallons more fuel capacity than the Q70 (21.7 vs. 20 gallons), for longer range between fill-ups. The LS Series Hybrid’s standard fuel tank has 2.2 gallons more fuel capacity than the Q70 (22.2 vs. 20 gallons).

Transmission

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A ten-speed automatic is standard on the Lexus LS Series, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q70.

The LS 500h has a standard continuously variable transmission (CVT). With no “steps” between gears, it can keep the engine at the most efficient speed for fuel economy, or keep it at its peak horsepower indefinitely for maximum acceleration. The Q70 doesn’t offer a CVT.

Brakes and Stopping

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

LS Series

LS Series F-Sport

Q70

Q70 Sport

Front Rotors

14 inches

15.7 inches

12.6 inches

14 inches

Rear Rotors

13.1 inches

14.1 inches

12.1 inches

13.8 inches

The LS Series stops shorter than the Q70:

LS Series

Q70

70 to 0 MPH

170 feet

171 feet

Car and Driver

60 to 0 MPH

113 feet

116 feet

Motor Trend

60 to 0 MPH (Wet)

139 feet

143 feet

Consumer Reports

Tires and Wheels

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For better ride, handling and brake cooling the LS Series has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Q70.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the LS Series can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Q70 doesn’t offer run-flat tires.

Suspension and Handling

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The LS 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 LS Series F-Sport offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The Q70 doesn’t offer an active sway bar system.

The LS Series 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 Q70’s suspension doesn’t offer adjustable shock absorbers.

The LS Series has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The LS Series’ height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The Q70 doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the LS Series’ wheelbase is 8.8 inches longer than on the Q70 (123 inches vs. 114.2 inches). The LS Series’ wheelbase is 2.9 inches longer than on the Q70L (123 inches vs. 120.1 inches).

For better handling and stability, the average track (width between the wheels) on the LS Series is 2.3 inches wider in the front and 2.4 inches wider in the rear than the average track on the Q70.

The LS 500 handles at .88 G’s, while the Q70 3.7 LUXE pulls only .82 G’s of cornering force in a Car and Driver skidpad test.

The LS 500 AWD executes Motor Trend’s “Figure Eight” maneuver 1 seconds quicker than the Q70 5.6 LUXE AWD (25.7 seconds @ .73 average G’s vs. 26.7 seconds @ .67 average G’s).

Passenger Space

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The LS Series has 1.2 inches more front hip room, .4 inches more front shoulder room, 2.7 inches more rear legroom and 1.6 inches more rear hip room than the Q70.

For enhanced passenger comfort on long trips the LS Series’ available rear seats recline. The Q70’s rear seats don’t recline.

Cargo Capacity

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The LS Series has a much larger trunk than the Q70 (17 vs. 14.9 cubic feet).

To make loading and unloading groceries and cargo easier when your hands are full, the LS Series’ power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The Q70 doesn’t offer a power or hands-free opening 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 LS 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 LS Series has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle and climate settings and the front passenger seat also adjusts to the new passenger’s preset preferences.

The LS 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 LS 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 LS Series and the Q70 have locks to prevent small children from operating them. When the lock on the LS 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 LS 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 LS Series’ headlight performance “Very 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 LS 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 LS Series detect other vehicles which could be blinded and automatically switch to low beams. The Q70 doesn’t offer automatic dimming high beams.

The LS Series has standard front air-conditioned seats and offers them optionally in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The Q70 doesn’t offer air-conditioned seats in the rear.

The LS Series offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Q70 doesn’t offer a house-current electrical outlet.

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

The Lexus LS Series outsold the Infiniti Q70 by over two to one during the 2019 model year.

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

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