2019 Cadillac CT6 vs. 2019 Audi A6

Detailed Review, Specifications & Comparison

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In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the CT6 are reminded to check the back seat if they opened the rear door before starting out. The A6 doesn’t offer a back seat reminder.

The CT6’s standard pretensioning seatbelts also sense rear collisions and remove slack from the front seatbelts to help protect the occupants from whiplash and other injuries. The A6 doesn’t offer a whiplash protection system.

Over 200 people are killed each year when backed over by motor vehicles. The CT6 Premium Luxury/Platinum/Sport has standard Reverse Automatic Braking that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The A6 doesn’t offer backup collision prevention brakes.

Both the CT6 and the A6 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee 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, daytime running lights, rearview cameras, available crash mitigating brakes, night vision systems, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.


Cadillac’s powertrain warranty covers the CT6 2 years and 20,000 miles longer than Audi covers the A6. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the A6 ends after only 4 years or 50,000 miles.

There are almost 3 times as many Cadillac dealers as there are Audi dealers, which makes it much easier should you ever need service under the CT6’s warranty.


J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Cadillac vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Cadillac 12th in initial quality, above the industry average. With 15 more problems per 100 vehicles, Audi is ranked 25th, below the industry average.


The CT6’s optional 3.0 turbo V6 produces 69 more horsepower (404 vs. 335) and 31 lbs.-ft. more torque (400 vs. 369) than the A6’s 3.0 turbo V6 hybrid. The CT6 V-Sport’s standard 4.2 turbo V8 produces 215 more horsepower (550 vs. 335) and 258 lbs.-ft. more torque (627 vs. 369) than the A6’s 3.0 turbo V6 hybrid.

Fuel Economy and Range

An engine control system that can shut down half of the engine’s cylinders helps improve the CT6 V6/V8’s fuel efficiency. The A6 doesn’t offer a system that can shut down part of the engine.

The CT6 has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The A6 doesn’t offer a cap-less fueling system.


A 10-speed automatic is standard on the Cadillac CT6, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the A6.

Brakes and Stopping

For better stopping power the CT6 AWD V6’s front brake rotors are larger than those on the A6:




Front Rotors

13.6 inches

13.3 inches

The CT6 stops shorter than the A6:





60 to 0 MPH

106 feet

107 feet

Motor Trend

Suspension and Handling

For a smoother ride and more stable handling, the CT6’s wheelbase is 7.3 inches longer than on the A6 (122.4 inches vs. 115.1 inches).

The CT6’s front to rear weight distribution is more even (51.2% to 48.8%) than the A6’s (55% to 45%). This gives the CT6 more stable handling and braking.


The Cadillac CT6 may be more efficient, handle and accelerate better because it weighs up to about 550 pounds less than the Audi A6.

The front grille of the CT6 uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The A6 doesn’t offer active grille shutters.

The CT6 uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The A6 doesn’t offer active noise cancellation.

Passenger Space

The CT6 has 2.2 inches more front headroom, 5.1 inches more front legroom, .5 inches more front shoulder room and 3 inches more rear legroom than the A6.

For enhanced passenger comfort on long trips the CT6’s available rear seats recline. The A6’s rear seats don’t recline.

Cargo Capacity

The CT6 has a much larger trunk than the A6 (15.8 vs. 13.7 cubic feet).


The CT6 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 A6 doesn’t offer a remote starting system.

The CT6’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The A6 does not have an oil pressure gauge.

Optional air conditioned front and rear seats keep the CT6’s passengers comfortable and take the sting out of hot leather in summer. The A6 doesn’t offer air-conditioned seats in the rear.

The CT6 Luxury/Premium/Platinum has a 115-volt a/c outlet, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The A6 doesn’t offer a house-current electrical outlet.

The CT6 Premium Luxury/Platinum/Sport’s Automatic Park Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The A6 doesn’t offer an automated parking system.

Model Availability

The CT6 is available in both rear-wheel drive and all-wheel drive configurations. The A6 doesn’t offer a two-wheel drive configuration.

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

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