2020 Cadillac CT6 vs. 2020 Audi A6

Detailed Review, Specifications & Comparison

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Safety

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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 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, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, available night vision systems and around view monitors.

Warranty

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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.

Reliability

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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 CT6’s reliability 12 points higher than the A6.

J.D. Power and Associates’ 2019 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 17th in initial quality. With 6 more problems per 100 vehicles, Audi is ranked 22nd.

Engine

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The CT6’s standard 3.6 DOHC V6 produces 87 more horsepower (335 vs. 248) and 12 lbs.-ft. more torque (285 vs. 273) than the A6 45 TFSI’s standard 2.0 turbo 4-cylinder. The CT6 Platinum’s standard 4.2 turbo V8 produces 165 more horsepower (500 vs. 335) and 205 lbs.-ft. more torque (574 vs. 369) than the A6 55 TFSI’s standard 3.0 turbo V6 hybrid.

Fuel Economy and Range

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An engine control system that can shut down some of the engine’s cylinders helps improve the CT6’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.

Transmission

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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

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

CT6 AWD

CT6 Platinum

A6

Front Rotors

13.6 inches

14.6 inches

13.3 inches

Rear Rotors

12.4 inches

13.3 inches

13 inches

Tires and Wheels

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The CT6 has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The A6 doesn’t offer vehicle monitored tire inflation.

Suspension and Handling

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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 (52.5% to 47.5%) than the A6’s (55% to 45%). This gives the CT6 more stable handling and braking.

Chassis

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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

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Because it has more passenger and cargo room, the EPA rates the CT6 a Large car, while the A6 is rated a Mid-size.

The CT6 has 22.2 cubic feet more passenger volume than the A6 (121.2 vs. 99).

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 Platinum’s rear seats recline. The A6’s rear seats don’t recline.

Cargo Capacity

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

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Cadillac service is better than Audi. J.D. Power ranks Cadillac third in service department satisfaction. With a 23% lower rating, Audi is ranked 8th.

Ergonomics

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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 Premium Luxury/Platinum has standard front air conditioned seats and the CT6 Platinum also has them in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The A6 doesn’t offer air-conditioned seats in the rear.

Both the CT6 and the A6 offer available massaging front seats. The CT6 Platinum also has standard massaging rear seats in order to maximize comfort and eliminate fatigue on long trips. Massaging rear seats aren’t available in the A6.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Cadillac CT6 has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the A6.

The CT6 Premium Luxury/Platinum’s Automatic Park Assist can parallel park or back into a parking spot by itself, starting and stopping automatically, with the driver only responsible for switching from reverse to drive. The A6 doesn’t offer an automated parking system.

Economic Advantages

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According to The Car Book by Jack Gillis, the CT6 is less expensive to operate than the A6 because typical repairs cost much less on the CT6 than the A6, including $8 less for a water pump, $252 less for a starter, $1098 less for fuel injection, $9 less for a fuel pump and $59 less for front struts.

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

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