2020 Audi A8 vs. 2020 Cadillac CT6

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2019 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 2019/12/13

Both the A8 and CT6 have child safety locks to prevent children from opening the rear doors. The A8 has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The CT6’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.

The A8 has a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The CT6 doesn’t offer front seat center airbags.

The A8 has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The CT6 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Both the A8 and the CT6 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, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

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The A8’s corrosion warranty is 6 years longer than the CT6’s (12 vs. 6 years).

Reliability

© 1999 - 2019 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 2019/12/13

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 A8’s reliability 40 points higher than the CT6.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Cadillac vehicles. J.D. Power ranks Audi 8th in reliability, above the industry average. With 42 more problems per 100 vehicles, Cadillac is ranked 23rd.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Audi vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks Audi 21 places higher in reliability than Cadillac.

Engine

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The A8 55 TSFI’s standard 3.0 turbo V6 hybrid produces 84 lbs.-ft. more torque (369 vs. 285) than the CT6’s standard 3.6 DOHC V6.

Fuel Economy and Range

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On the EPA test cycle the A8 55 TSFI gets better fuel mileage than the CT6 (19 city/27 hwy vs. 18 city/27 hwy).

On the EPA test cycle the A8 55 TSFI gets better fuel mileage than the CT6 V6 (19 city/27 hwy vs. 18 city/27 hwy).

Regenerative brakes improve the A8’s fuel efficiency by converting inertia back into energy instead of wasting it. The CT6 doesn’t offer a regenerative braking system.

The A8 has 2.5 gallons more fuel capacity than the CT6 (21.7 vs. 19.2 gallons), for longer range between fill-ups.

Brakes and Stopping

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For better stopping power the A8’s brake rotors are larger than those on the CT6:

A8 55 TSFI

A8 60 TFSI

CT6 AWD

CT6 Platinum

Front Rotors

14.8 inches

15.8 inches

13.6 inches

14.6 inches

Rear Rotors

13.8 inches

13.8 inches

12.4 inches

13.3 inches

Tires and Wheels

© 1999 - 2019 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 2019/12/13

For better traction, the A8 has larger standard tires than the CT6 (255/45R19 vs. 245/45R19). The A8’s optional tires are larger than the largest tires available on the CT6 (265/40R20 vs. 245/45R19).

Suspension and Handling

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The front and rear suspension of the A8 uses air springs for a smoother, controlled ride than the CT6, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The A8 offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Cadillac doesn’t offer an active suspension on the CT6.

The A8 has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The A8’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The CT6 doesn’t offer a load leveling suspension.

For better handling and stability, the track (width between the wheels) on the A8 is 1.3 inches wider in the front and .3 inches wider in the rear than on the CT6.

Passenger Space

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The A8 has .8 inches more front shoulder room, .5 inches more rear headroom, 3.9 inches more rear legroom and 1.4 inches more rear shoulder room than the CT6.

Cargo Capacity

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A low lift-over trunk design makes loading and unloading the A8 easier. The A8’s trunk lift-over height is 27.4 inches, while the CT6’s liftover is 29.1 inches.

Towing

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The A8’s standard towing capacity is much higher than the CT6’s (3500 vs. 1000 pounds).

While the CT6 V8 can only tow 900, any A8 can tow a minimum of 3500 pounds.

Ergonomics

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In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A8 has standard headlight washers to keep headlight output high. The CT6 doesn’t offer headlight washers.

The CT6 Premium Luxury/Platinum’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The A8’s optional 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 A8 offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The CT6 doesn’t offer a house-current electrical outlet.

Recommendations

© 1999 - 2019 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 2019/12/13

Consumer Reports® recommends the Audi A8, based on reliability, safety and performance.

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

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