2020 Acura RLX vs. 2020 Audi S8

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 2020/06/05

The RLX has standard whiplash protection, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the whiplash protection system moves the headrests forward to prevent neck and spine injuries. The S8 doesn’t offer a whiplash protection system.

Both the RLX and the S8 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, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras and available around view monitors.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, its standard front crash prevention system, and its headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the RLX the rating of “Top Pick” for 2018, a rating granted to only 153 vehicles tested by the IIHS. The S8 has not been tested, yet.

Warranty

© 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 2020/06/05

Acura’s powertrain warranty covers the RLX 2 years and 20,000 miles longer than Audi covers the S8. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the S8 ends after only 4 years or 50,000 miles.

Reliability

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The engines in the RLX have a single overhead cam for simplicity. The engine in the S8 has dual overhead cams, which add to the number of moving parts and the complexity of the cylinder heads.

To reliably start during all conditions and help handle large electrical loads, the RLX has a standard 550-amp battery. The S8’s 380-amp battery isn’t as powerful.

Fuel Economy and Range

© 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 2020/06/05

On the EPA test cycle the RLX Sport Hybrid SMG gets better fuel mileage than the S8 (28 city/29 hwy vs. 13 city/22 hwy).

An engine control system that can shut down some of the engine’s cylinders helps improve the RLX’s fuel efficiency. The S8 doesn’t offer a system that can shut down part of the engine.

To lower fuel costs and make buying fuel easier, the Acura RLX uses regular unleaded gasoline (premium recommended for maximum performance). The S8 requires premium, which can cost 20 to 55 cents more per gallon.

The RLX 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 S8 doesn’t offer a cap-less fueling system.

Transmission

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A 10-speed automatic is standard on the Acura RLX V6, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the S8.

The RLX 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 S8 doesn’t offer an SMG or a conventional manual transmission.

Suspension and Handling

© 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 2020/06/05

For better maneuverability, the RLX’s turning circle is 1.8 feet tighter than the S8’s (40.5 feet vs. 42.3 feet).

Chassis

© 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 2020/06/05

The Acura RLX may be more efficient, handle and accelerate better because it weighs about 900 to 1350 pounds less than the Audi S8.

The RLX is 10.9 inches shorter than the S8, making the RLX easier to handle, maneuver and park in tight spaces.

Passenger Space

© 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 2020/06/05

The RLX has .8 inches more front legroom and .5 inches more front shoulder room than the S8.

Cargo Capacity

© 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 2020/06/05

The RLX has a much larger trunk than the S8 (14.9 vs. 12.5 cubic feet).

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Acura service is better than Audi. J.D. Power ranks Acura 6th in service department satisfaction (above the industry average). With a 9% lower rating, Audi is ranked 8th.

Ergonomics

© 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 2020/06/05

The RLX Sport Hybrid 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 S8 doesn’t offer a remote starting system.

The RLX’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The S8’s cruise control switches are unlit, making them difficult to find at night and operate safely.

Model Availability

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The RLX is available in both front-wheel drive and all-wheel drive configurations. The S8 doesn’t offer a two-wheel drive configuration.

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