2019 Infiniti Q50 vs. 2019 Lexus GS Series

Detailed Review, Specifications & Comparison

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The Q50 Sport’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The GS Series doesn’t offer pre-crash pretensioners.

Over 200 people are killed each year when backed over by motor vehicles. The Q50 (except 2.0t) offers optional Back-up Collision Intervention which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The GS Series doesn’t offer backup collision prevention brakes.

The Q50 (except 2.0t) offers an optional Around View® Monitor to allow the driver to see objects all around the vehicle on a screen. The GS Series only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

Both the Q50 and the GS Series have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front 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, rearview cameras, available all wheel drive, lane departure warning systems, blind spot warning systems and rear cross-path warning.


The Q50 comes with a full 4-year/60,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The GS Series’ 4-year/50,000-mile basic warranty expires 10,000 miles sooner.

The Q50’s corrosion warranty is 1 year longer than the GS Series’ (7 vs. 6 years).


The Q50 has more powerful engines than the GS Series:




Q50 3.0t turbo V6

300 HP

295 lbs.-ft.

Q50 Red Sport 400 3.0 turbo V6

400 HP

350 lbs.-ft.

GS 300 2.0 DOHC turbo 4 cyl.

241 HP

258 lbs.-ft.

GS 350 3.5 DOHC V6

311 HP

280 lbs.-ft.

GS 450h 3.5 DOHC V6 hybrid

338 HP


As tested in Consumer Reports the Q50 3.0t is faster than the GS 350:



GS Series

Zero to 30 MPH

2.4 sec

2.6 sec

Zero to 60 MPH

5.7 sec

6.2 sec

Quarter Mile

14.2 sec

14.7 sec

Speed in 1/4 Mile

103 MPH

99 MPH

Fuel Economy and Range

On the EPA test cycle the Q50 gets better fuel mileage than the GS Series:




GS Series




20 city/29 hwy

20 city/28 hwy




19 city/27 hwy

19 city/26 hwy


The Q50 has 2.6 gallons more fuel capacity than the GS Series (20 vs. 17.4 gallons), for longer range between fill-ups.

Brakes and Stopping

The Q50 stops much shorter than the GS Series:



GS Series


70 to 0 MPH

165 feet

174 feet

Car and Driver

60 to 0 MPH

126 feet

137 feet

Consumer Reports

60 to 0 MPH (Wet)

131 feet

147 feet

Consumer Reports

Tires and Wheels

For better traction, the Q50 Red Sport 400’s front tires are larger than the largest tires available on the GS Series (F:245/40R19 & R:265/35R19 vs. F:235/40R19 & R:265/35R19).

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the Q50 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The GS Series doesn’t offer run-flat tires.

Suspension and Handling

The Q50 Sport’s optional drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The GS Series doesn’t offer drift compensation steering.

Passenger Space

The Q50 has 2.5 cubic feet more passenger volume than the GS Series (101.5 vs. 99).

The Q50 has 2.2 inches more front headroom, 2.2 inches more front legroom and .4 inches more rear shoulder room than the GS Series.

Cargo Capacity

The Q50’s optional rear seats fold to accommodate long and bulky cargo. The GS Series doesn’t offer folding rear seats, only a ski pass-through.

Servicing Ease

A maintenance reminder system is standard on the Q50 to save the owner time and money by calculating maintenance intervals for oil changes and tire rotation based on odometer mileage. This takes the guesswork out of keeping your vehicle in top condition and helps it last longer. Lexus doesn’t offer a maintenance reminder on the GS Series.

J.D. Power and Associates surveys of service recipients show that Infiniti service is better than Lexus. J.D. Power ranks Infiniti first in service department satisfaction. With a 5% lower rating, Lexus is ranked third.


The Q50’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 GS Series’ standard manually variable intermittent wipers have to be constantly adjusted.

Economic Advantages

According to The Car Book by Jack Gillis, the Q50 is less expensive to operate than the GS Series because typical repairs cost much less on the Q50 than the GS Series, including $330 less for a water pump, $340 less for a starter, $316 less for fuel injection, $1058 less for a timing belt/chain and $235 less for a power steering pump.


The Infiniti Q50 outsold the Lexus GS Series by over five to one during 2017.

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

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