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For enhanced safety, the front and rear seat shoulder belts of the Audi A6 have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision. The Chevrolet Impala doesn’t offer pretensioners for the rear seat belts.
The A6’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Impala doesn’t offer pre-crash pretensioners.
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 Impala 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.
The A6 has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Impala doesn’t offer all-wheel drive.
A passive 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 to detect heat, the system then displays the image on a monitor in the dashboard. The Impala doesn’t offer a night vision system.
The A6 offers an optional Top and Corner View Cameras to allow the driver to see objects all around the vehicle on a screen. The Impala only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.
Both the A6 and the Impala have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available blind spot warning systems and rear cross-path warning.
The Audi A6 weighs 466 to 536 pounds more than the Chevrolet Impala. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.
The A6 comes with a full 4-year/50,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The Impala’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.
The A6’s corrosion warranty is 6 years and unlimited miles longer than the Impala’s (12/unlimited vs. 6/100,000).
From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Audi vehicles are more reliable than Chevrolet vehicles. Consumer Reports ranks Audi 16 places higher in reliability than Chevrolet.
The A6’s 3.0 turbo V6 hybrid produces 138 more horsepower (335 vs. 197) and 178 lbs.-ft. more torque (369 vs. 191) than the Impala’s standard 2.5 DOHC 4 cyl. The A6’s 3.0 turbo V6 hybrid produces 30 more horsepower (335 vs. 305) and 105 lbs.-ft. more torque (369 vs. 264) than the Impala’s optional 3.6 DOHC V6.
On the EPA test cycle the A6 3.0T gets better fuel mileage than the Impala V6 (22 city/29 hwy vs. 19 city/28 hwy). The A6 3.0T gets better fuel mileage than the Impala V6 Flex Fuel (22 city/29 hwy vs. 18 city/28 hwy).
Regenerative brakes improve the A6’s fuel efficiency by converting inertia back into energy instead of wasting it. The Impala doesn’t offer a regenerative braking system.
A seven-speed automatic (SMG) is standard on the Audi A6, for better acceleration and lower engine speed on the highway. Only a six-speed automatic is available for the Impala.
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 Impala doesn’t offer an SMG or a conventional manual transmission.
For better stopping power the A6’s brake rotors are larger than those on the Impala:
The A6’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Impala are solid, not vented.
For better traction, the A6 has larger standard tires than the Impala (245/45R19 vs. 235/50R18). The A6’s optional tires are larger than the largest tires available on the Impala (255/40R20 vs. 245/45R19).
The A6’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Impala’s standard 50 series tires. The A6 Prestige’s optional tires have a lower 35 series profile than the Impala Premier’s optional 40 series tires.
For better ride, handling and brake cooling the A6 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Impala. The A6 Prestige’s optional 21-inch wheels are larger than the 20-inch wheels optional on the Impala Premier.
The A6 offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The Impala’s suspension doesn’t offer adjustable shock absorbers.
For a smoother ride and more stable handling, the A6’s wheelbase is 3.4 inches longer than on the Impala (115.1 inches vs. 111.7 inches).
For better handling and stability, the track (width between the wheels) on the A6 is 3 inches wider in the front and 1.7 inches wider in the rear than on the Impala.
For better maneuverability, the A6’s turning circle is 2.4 feet tighter than the Impala’s (36.4 feet vs. 38.8 feet).
The A6 is 6.9 inches shorter than the Impala, making the A6 easier to handle, maneuver and park in tight spaces.
To make loading and unloading groceries and cargo easier, especially for short adults, the A6 Prestige has a standard power trunk, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The Impala doesn’t offer a power trunk.
The engine in the A6 is mounted longitudinally (North-South), instead of sideways, as in the Impala. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.
J.D. Power and Associates surveys of service recipients show that Audi service is better than Chevrolet. J.D. Power ranks Audi third in service department satisfaction. With a 22% lower rating, Chevrolet is ranked 10th.
The A6’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. An easy entry system costs extra on the Impala, and is not available on all models.
The A6 Prestige has a standard heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Impala doesn’t offer a heads-up display.
The A6’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The Impala’s manually variable intermittent wipers have to be constantly adjusted.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A6 offers available headlight washers to keep headlight output high. The Impala doesn’t offer headlight washers.
While driving with high beams on, sensitive light sensors available for the A6 detect other vehicles which could be blinded and automatically switch to low beams. The Impala doesn’t offer automatic dimming high beams.
A power rear sunshade is standard in the A6 to help block heat and glare for the rear passengers. The Impala doesn’t offer a rear sunshade.
The A6’s standard outside mirrors include heating elements to clear off the mirrors for better visibility. Chevrolet only offers heated mirrors on the Impala LT/Premier.
When the A6 is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The Impala’s mirror doesn’t automatically adjust for backing.
The A6 has standard heated front seats. Heated front seats cost extra on the Impala, and aren’t available on the Impala LS. The A6 also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the Impala.
The A6 has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning is only available on the Impala LT/Premier.
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