2019 Genesis G90 vs. 2019 Cadillac CT6

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 Cadillac CT6 doesn’t offer pretensioners for the rear seat belts.

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 CT6 doesn’t offer a driver alert monitor.

Both the G90 and the CT6 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee 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 and available all wheel drive.

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 28 vehicles tested by the IIHS. The CT6 has not been tested, yet.


The G90 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes free 24-hour roadside assistance. The CT6’s 4-year/50,000-mile basic warranty expires 1 year and 10,000 miles sooner.

Genesis’ powertrain warranty covers the G90 4 years and 30,000 miles longer than Cadillac covers the CT6. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the CT6 ends after only 6 years or 70,000 miles.

The G90’s corrosion warranty is 1 year longer than the CT6’s (7 vs. 6 years).


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 G90’s reliability 20 points higher than the CT6.

J.D. Power and Associates rated the G90 first among large premium cars in their 2018 Initial Quality Study. The CT6 isn’t in the top three in its category.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Genesis vehicles are better in initial quality than Cadillac vehicles. J.D. Power ranks Genesis first in initial quality, above the industry average. With 22 more problems per 100 vehicles, Cadillac is ranked 12th.


The G90 has more powerful engines than the CT6:




G90 3.3T turbo V6

365 HP

376 lbs.-ft.

G90 5.0 DOHC V8

420 HP

383 lbs.-ft.

CT6 2.0 turbo 4 cyl.

265 HP

295 lbs.-ft.

CT6 3.6 DOHC V6

335 HP

285 lbs.-ft.

CT6 3.0 turbo V6

404 HP

400 lbs.-ft.

As tested in Motor Trend the G90 3.3T is faster than the Cadillac CT6 2.0 Turbo:




Zero to 60 MPH

5.3 sec

6.4 sec

Zero to 80 MPH

8.9 sec

10.8 sec

Passing 45 to 65 MPH

2.8 sec

3.6 sec

Quarter Mile

13.9 sec

14.7 sec

Speed in 1/4 Mile

99.9 MPH

92.8 MPH

Fuel Economy and Range

To lower fuel costs and make buying fuel easier, the Genesis G90 uses regular unleaded gasoline (premium recommended for maximum performance). The CT6 with the 3.0 turbo V6 engine requires premium, which can cost 20 to 55 cents more per gallon.

The G90 has 2.4 gallons more fuel capacity than the CT6 (21.9 vs. 19.5 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 CT6:


G90 3.3T

G90 5.0

CT6 2.0


Front Rotors

14.2 inches

14.8 inches

12.6 inches

13.6 inches

Rear Rotors

13.4 inches

13.4 inches

12.4 inches

12.4 inches

Tires and Wheels

For better traction, the G90 has larger tires than the CT6 (F:245/45R19 & R:275/40R19 vs. 235/50R18).

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 CT6’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 CT6.

Suspension and Handling

For a smoother ride and more stable handling, the G90’s wheelbase is 2 inches longer than on the CT6 (124.4 inches vs. 122.4 inches).

For better handling and stability, the track (width between the wheels) on the G90 is 1.2 inches wider in the front and .5 inches wider in the rear than on the CT6.

The G90 3.3T AWD handles at .85 G’s, while the CT6 pulls only .81 G’s of cornering force in a Car and Driver skidpad test.

The G90 3.3T AWD executes Motor Trend’s “Figure Eight” maneuver quicker than the CT6 (26.1 seconds @ .72 average G’s vs. 26.7 seconds @ .66 average G’s).

For better maneuverability, the G90’s turning circle is .8 feet tighter than the CT6’s (39.2 feet vs. 40 feet).

Passenger Space

The G90 has .9 inches more front headroom, .6 inches more front hip room, .8 inches more front shoulder room, 1.5 inches more rear hip room and 1.7 inches more rear shoulder room than the CT6.

Cargo Capacity

A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the G90. The CT6 doesn’t offer locking storage for small valuables.


The CT6 Premium Luxury/Platinum/Sport’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The G90’s standard adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

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 CT6 Premium Luxury/Platinum/Sport.


Consumer Reports® recommends the Genesis G90, based on reliability, safety and performance.

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

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