2020 Cadillac CT6 vs. 2020 Audi A8

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

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 A8 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 A8 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 A8 doesn’t offer backup collision prevention brakes.

Both the CT6 and the A8 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 A8. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the A8 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 A8.

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 has more powerful engines than the A8:

Horsepower

Torque

CT6 Platinum 4.2 turbo V8

500 HP

574 lbs.-ft.

A8 55 TSFI 3.0 turbo V6 hybrid

335 HP

369 lbs.-ft.

A8 60 TSFI e 3.0 turbo V6 hybrid

443 HP

516 lbs.-ft.

A8 60 TFSI 4.0 turbo V8 hybrid

453 HP

487 lbs.-ft.

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 A8 doesn’t offer a system that can shut down part of the engine.

The CT6 has 2 gallons more fuel capacity than the A8 60 TFSI e Hybrid’s standard fuel tank (19.2 vs. 17.2 gallons), for longer range between fill-ups.

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 A8 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 an eight-speed automatic is available for the A8.

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 A8 doesn’t offer vehicle monitored tire inflation.

Suspension and Handling

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For better maneuverability, the CT6’s turning circle is 2.3 feet tighter than the A8’s (40 feet vs. 42.3 feet).

Chassis

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The Cadillac CT6 may be more efficient, handle and accelerate better because it weighs about 250 to 700 pounds less than the Audi A8.

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 A8 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 A8 doesn’t offer active noise cancellation.

Passenger Space

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The CT6 has 1.9 inches more front headroom and 4.9 inches more front legroom than the A8.

Cargo Capacity

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The CT6 has a much larger trunk than the A8 (15.8 vs. 12.5 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 A8 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 A8 does not have an oil pressure gauge.

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 A8.

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 A8 doesn’t offer an automated parking system.

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 Cadillac CT6 outsold the Audi A8/S8 by almost three to one during 2019.

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