2018 Genesis G90 vs. 2017 Kia K900

Detailed Review, Specifications & Comparison

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For enhanced safety, the front and rear seat shoulder belts of the Genesis G90 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 Kia K900 doesn’t offer pretensioners for the rear seat belts.

The G90 offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The K900 doesn’t offer all-wheel drive.

The G90’s 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 K900 doesn’t offer a driver alert monitor.

Both the G90 and the K900 have standard driver and passenger frontal airbags, front and rear 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, blind spot warning systems, rearview cameras and rear cross-path warning.

For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, its standard front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the G90 its highest rating: “Top Pick Plus” for 2018, a rating granted to only 13 vehicles tested by the IIHS. The K900 has not been tested, yet.


The G90’s corrosion warranty is 2 years and unlimited miles longer than the K900’s (7/unlimited vs. 5/100,000).


The G90 3.3T’s standard 3.3 turbo V6 produces 54 more horsepower (365 vs. 311) and 83 lbs.-ft. more torque (376 vs. 293) than the K900’s standard 3.8 DOHC V6. The G90 5.0’s standard 5.0 DOHC V8 produces 7 lbs.-ft. more torque (383 vs. 376) than the K900’s optional 5.0 DOHC V8.

As tested in Motor Trend the Genesis G90 is faster than the Kia K900 V8:


G90 3.3T

G90 5.0


Zero to 60 MPH

5.3 sec

5 sec

5.6 sec

Quarter Mile

13.9 sec

13.5 sec

14 sec

Fuel Economy and Range

On the EPA test cycle the G90 3.3T RWD gets better fuel mileage than the K900 V8 (17 city/24 hwy vs. 15 city/23 hwy).

The G90 has 2.1 gallons more fuel capacity than the K900 (21.9 vs. 19.8 gallons), for longer range between fill-ups.

Brakes and Stopping

For better stopping power the G90’s brake rotors are larger than those on the K900:


G90 3.3T

G90 5.0

K900 V6

K900 V8

Front Rotors

14.2 inches

14.8 inches

13.6 inches

14.2 inches

Rear Rotors

13.4 inches

13.4 inches

12.4 inches

12.4 inches

The G90’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the K900 are solid, not vented.

The G90 stops shorter than the K900:





60 to 0 MPH

117 feet

123 feet

Motor Trend

Tires and Wheels

For better traction and acceleration, the G90 has larger rear tires than the K900 (275/40R19 vs. 245/50R18).

The G90’s 245/45R19 front and 275/40R19 rear tires provide better handling because they have a lower 45 series front and 40 series rear profile (height to width ratio) that provides a stiffer sidewall than the K900 V6’s standard 50 series tires.

For better ride, handling and brake cooling the G90 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the K900 V6.

Suspension and Handling

The G90 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 K900’s suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the G90’s wheelbase is 4.5 inches longer than on the K900 (124.4 inches vs. 119.9 inches).

The G90 3.3T AWD handles at .85 G’s, while the K900 V8 Luxury pulls only .80 G’s of cornering force in a Motor Trend skidpad test.

The G90 3.3T AWD executes Motor Trend’s “Figure Eight” maneuver 2.2 seconds quicker than the K900 V8 Luxury (26.1 seconds @ .72 average G’s vs. 28.3 seconds @ .61 average G’s).

Passenger Space

The G90 has 2.4 cubic feet more passenger volume than the K900 (113.2 vs. 110.8).

The G90 has .9 inches more front headroom, .4 inches more front legroom, .6 inches more front hip room, .4 inches more rear headroom and .7 inches more rear shoulder room than the K900.


Unlike the driver-only memory system in the K900, the G90 has standard driver and 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.

While driving with high beams on, sensitive light sensors standard on the G90 detect other vehicles which could be blinded and automatically switch to low beams. The K900 doesn’t offer automatic dimming high beams.

The G90 has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel is only available on the K900 Luxury.


The Genesis G90 outsold the Kia K900 by almost ten to one during 2017.

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

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