2018 Audi A6 vs. 2018 Genesis G90

Detailed Review, Specifications & Comparison

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Safety

Both the A6 and G90 have child safety locks to prevent children from opening the rear doors. The A6 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 G90’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 A6 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 G90 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.

An active infrared night vision system optional on the A6 Prestige helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera and near-infrared lights to detect heat, the system then projects the image on the windshield, near the driver’s line of sight. The G90 doesn’t offer a night vision system.

Both the A6 and the G90 have standard driver and passenger frontal airbags, front side-impact airbags, driver 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 all-wheel drive, crash mitigating brakes, lane departure warning systems, blind spot warning systems and around view monitors.

Warranty

The A6’s corrosion warranty is 5 years longer than the G90’s (12 vs. 7 years).

Engine

As tested in Car and Driver the A6 3.0T 3.0 supercharged V6 is faster than the G90 5.0 DOHC V8:

 

A6

G90

Zero to 60 MPH

5.2 sec

5.3 sec

Zero to 100 MPH

12.3 sec

12.6 sec

Quarter Mile

13.7 sec

13.8 sec

Fuel Economy and Range

On the EPA test cycle the A6 3.0T Quattro V6 gets better fuel mileage than the G90 3.3T AWD (20 city/29 hwy vs. 17 city/24 hwy).

In heavy traffic or at stoplights the A6’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The G90 doesn’t offer an automatic engine start/stop system.

Transmission

The A6 offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The G90 doesn’t offer an SMG or a conventional manual transmission.

Brakes and Stopping

The A6 stops much shorter than the G90:

 

A6

G90

 

70 to 0 MPH

156 feet

179 feet

Car and Driver

60 to 0 MPH

106 feet

119 feet

Motor Trend

Tires and Wheels

For better traction, the A6’s optional tires are larger than the largest tires available on the G90 (255/40R19 vs. 245/45R19).

The A6’s optional tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the G90’s 45 series front and 40 series rear tires.

For better ride, handling and brake cooling the A6 offers optional 20-inch wheels. The G90’s largest wheels are only 19-inches.

Suspension and Handling

The A6 3.0T Premium Plus Quattro handles at .95 G’s, while the G90 3.3T AWD pulls only .83 G’s of cornering force in a Motor Trend skidpad test.

The A6 3.0T Premium Plus Quattro executes Motor Trend’s “Figure Eight” maneuver 1.8 seconds quicker than the G90 3.3T AWD (25.1 seconds @ .74 average G’s vs. 26.9 seconds @ .67 average G’s).

Chassis

The Audi A6 may be more efficient, handle and accelerate better because it weighs about 750 to 850 pounds less than the Genesis G90.

The A6 is 10.7 inches shorter than the G90, making the A6 easier to handle, maneuver and park in tight spaces.

Cargo Capacity

The A6’s standard rear seats fold to accommodate long and bulky cargo. The G90 doesn’t offer folding rear seats, only a ski pass-through.

Ergonomics

If the windows are left down on the A6 the driver can raise them all using the key in the outside lock cylinder; on a hot day the driver can lower the windows. The driver of the G90 can only operate the windows from inside the vehicle, with the ignition on.

Heated windshield washer nozzles are standard on the A6 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The G90 doesn’t offer heated windshield washer nozzles.

Economic Advantages

Insurance will cost less for the A6 owner. The Complete Car Cost Guide estimates that insurance for the A6 will cost $385 to $5060 less than the G90 over a five-year period.

The A6 will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the A6 will retain 41.4% to 42.33% of its original price after five years, while the G90 only retains 39.47% to 39.64%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Audi A6 will be $6671 to $21819 less than for the Genesis G90.

Recommendations

Consumer Reports® recommends the Audi A6, based on reliability, safety and performance.

The A6 was chosen as one of Car and Driver’s “Top Ten” for 5 of the last 18 years. The G90 has never been a Car and Driver “Top Ten” pick.

The Audi A6/S6 outsold the Genesis G90 (Equus) by over four to one during the 2017 model year.

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

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