2020 Infiniti Q50 vs. 2020 Kia Cadenza

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 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 2020/07/13

The Q50 Sport/Red Sport 400’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Cadenza doesn’t offer pre-crash pretensioners.

The Q50 offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Cadenza doesn’t offer all-wheel drive.

Both the Q50 and the Cadenza 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, collision warning systems, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

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The Q50’s corrosion warranty is 2 years and unlimited miles longer than the Cadenza’s (7/unlimited vs. 5/100,000).

Engine

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The Q50 3.0t’s standard 3.0 turbo V6 produces 10 more horsepower (300 vs. 290) and 42 lbs.-ft. more torque (295 vs. 253) than the Cadenza’s 3.3 DOHC V6. The Q50 Red Sport 400’s standard 3.0 turbo V6 produces 110 more horsepower (400 vs. 290) and 97 lbs.-ft. more torque (350 vs. 253) than the Cadenza’s 3.3 DOHC V6.

As tested in Consumer Reports the Q50 3.0t is faster than the Kia Cadenza:

Q50

Cadenza

Zero to 30 MPH

2.4 sec

2.9 sec

Zero to 60 MPH

5.7 sec

7 sec

45 to 65 MPH Passing

4.2 sec

4.4 sec

Quarter Mile

14.2 sec

15.3 sec

Speed in 1/4 Mile

103 MPH

98 MPH

Fuel Economy and Range

© 1999 - 2020 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 2020/07/13

On the EPA test cycle the Q50 3.0t RWD gets better fuel mileage than the Cadenza (20 city/29 hwy vs. 20 city/28 hwy).

In heavy traffic or at stoplights the Q50 2.0t’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 Cadenza doesn’t offer an automatic engine start/stop system.

The Q50 has 1.5 gallons more fuel capacity than the Cadenza (20 vs. 18.5 gallons), for longer range between fill-ups.

Brakes and Stopping

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For better stopping power the Q50 Sport/Red Sport 400’s brake rotors are larger than those on the Cadenza:

Q50 Sport/Red Sport 400

Cadenza

Front Rotors

14 inches

12.6 inches

Rear Rotors

13.8 inches

11.8 inches

The Q50’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Cadenza are solid, not vented.

The Q50 stops shorter than the Cadenza:

Q50

Cadenza

60 to 0 MPH

126 feet

127 feet

Consumer Reports

60 to 0 MPH (Wet)

131 feet

141 feet

Consumer Reports

Tires and Wheels

© 1999 - 2020 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 2020/07/13

The Q50 Red Sport 400’s 265/35R19 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the Cadenza Limited’s 40 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard 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 Cadenza doesn’t offer run-flat tires.

Suspension and Handling

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The Q50 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. The Cadenza’s suspension doesn’t offer adjustable shock absorbers.

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 Cadenza doesn’t offer drift compensation steering.

Chassis

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The Q50 is 7.1 inches shorter than the Cadenza, making the Q50 easier to handle, maneuver and park in tight spaces.

Cargo Capacity

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

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the Q50 offers cargo security. The Cadenza’s non-lockable remote release defeats cargo security.

Servicing Ease

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The engine in the Q50 is mounted longitudinally (North-South), instead of sideways, as in the Cadenza. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.

J.D. Power and Associates surveys of service recipients show that Infiniti service is better than Kia. J.D. Power ranks Infiniti fourth in service department satisfaction. With a 53% lower rating, Kia is ranked 20th.

Ergonomics

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The Q50’s 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 Cadenza’s standard 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 Q50 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 Cadenza can only operate the windows from inside the vehicle, with the ignition on.

To help drivers see further while navigating curves, the Q50 Sport/Red Sport 400 offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The Cadenza doesn’t offer cornering lights.

The Q50’s standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The Cadenza has an automatic rear view mirror, but its side mirrors don’t dim.

Economic Advantages

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Insurance will cost less for the Q50 owner. The Car Book by Jack Gillis rates the Q50 with a number “1” insurance rate while the Cadenza is rated higher at a number “5” rate.

The Q50 will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the Q50 will retain 36.99% to 46.1% of its original price after five years, while the Cadenza only retains 30.95% to 34.32%.

According to The Car Book by Jack Gillis, the Q50 is less expensive to operate than the Cadenza because it costs $81 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the Q50 than the Cadenza, including $16 less for a water pump and $245 less for a muffler.

Recommendations

© 1999 - 2020 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 2020/07/13

The Infiniti Q50 outsold the Kia Cadenza by almost 16 to one during 2019.

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