2020 Porsche 718 Cayman vs. 2019 Audi RS 5

Detailed Review, Specifications & Comparison

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Safety

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Both the 718 Cayman and the RS 5 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available crash mitigating brakes and blind spot warning systems.

Reliability

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To reliably power the ignition and other systems and to recharge the battery, the 718 Cayman has a 120-amp alternator. The RS 5’s standard 110-amp alternator isn’t as powerful.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Porsche 15th in initial quality. With 10 more problems per 100 vehicles, Audi is ranked 22nd.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than Audi vehicles. J.D. Power ranks Porsche second in reliability, above the industry average. With 16 more problems per 100 vehicles, Audi is ranked 8th.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Porsche vehicles are more reliable than Audi vehicles. Consumer Reports ranks Porsche fourth in reliability. Audi is ranked 14th.

Engine

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In a Car and Driver racecourse test, the Porsche 718 Cayman was clocked 7.2 seconds faster than the Audi RS 5 (176.7 sec. vs. 183.9 sec.).

The flat cylinder configuration of the boxer engine in the 718 Cayman lowers its center of gravity, enhancing handling stability. The RS 5 doesn’t offer a boxer engine configuration.

Fuel Economy and Range

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On the EPA test cycle the 718 Cayman gets better fuel mileage than the RS 5:

MPG

718 Cayman

Manual

2.0 turbo 4-cyl.

21 city/28 hwy

S 2.5 turbo 4-cyl.

20 city/26 hwy

Auto

2.0 turbo 4-cyl.

22 city/29 hwy

S 2.5 turbo 4-cyl.

21 city/28 hwy

RS 5

Auto

2.9 turbo V6

18 city/27 hwy

In heavy traffic or at stoplights the 718 Cayman’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 RS 5 doesn’t offer an automatic engine start/stop system.

The 718 Cayman’s optional fuel tank has 1.6 gallons more fuel capacity than the RS 5 (16.9 vs. 15.3 gallons).

Transmission

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The 718 Cayman offers a manual transmission for better acceleration, control and fuel economy. The RS 5 doesn’t offer a manual transmission.

The 718 Cayman offers an optional 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 RS 5 doesn’t offer an SMG.

The 718 Cayman PDK’s optional launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The RS 5 doesn’t offer launch control.

Brakes and Stopping

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For better stopping power the 718 Cayman GT4’s brake rotors are larger than those on the RS 5:

Cayman GT4

GT4 opt.

RS 5

RS 5 opt.

Front Rotors

15 inches

16.1 inches

14.8 inches

15.7 inches

Rear Rotors

15 inches

15.4 inches

13 inches

13 inches

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 2020/06/02

For better maneuverability, the 718 Cayman’s turning circle is 2.3 feet tighter than the RS 5’s (36.1 feet vs. 38.4 feet). The 718 Cayman GT4’s turning circle is .9 feet tighter than the RS 5’s (37.5 feet vs. 38.4 feet).

Chassis

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The Porsche 718 Cayman may be more efficient, handle and accelerate better because it weighs about 750 to 950 pounds less than the Audi RS 5.

The 718 Cayman is 1 foot, 1.6 inches shorter than the RS 5, making the 718 Cayman easier to handle, maneuver and park in tight spaces.

Passenger Space

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The 718 Cayman has .1 inches more front headroom and .9 inches more front legroom than the RS 5.

Cargo Capacity

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The 718 Cayman has a much larger trunk than the RS 5 (15 vs. 11.6 cubic feet).

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Porsche service is better than Audi. J.D. Power ranks Porsche first in service department satisfaction. With a 36% lower rating, Audi is ranked 8th.

Ergonomics

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The 718 Cayman’s optional easy entry system raises the steering wheel and glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The RS 5 doesn’t offer an easy entry system.

The 718 Cayman’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 RS 5 does not have an oil pressure gauge.

To improve rear visibility by keeping the rear window clear, the 718 Cayman offers an optional rear wiper. The RS 5 doesn’t offer a rear wiper.

To help drivers see further while navigating curves, the 718 Cayman offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The RS 5 doesn’t offer cornering lights.

Model Availability

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The Porsche 718 comes in coupe and convertible bodystyles; the Audi RS 5 isn’t available as a convertible.

Economic Advantages

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Insurance will cost less for the 718 Cayman owner. The Complete Car Cost Guide estimates that insurance for the 718 Cayman will cost $6950 to $8695 less than the RS 5 over a five-year period.

The 718 Cayman will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the 718 Cayman will retain 59.69% to 60.13% of its original price after five years, while the RS 5 only retains 45.19%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Porsche 718 Cayman will be $16665 to $33104 less than for the Audi RS 5.

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 2020/06/02

The Cayman was chosen as one of Car and Driver’s “Top Ten” for 14 of the last 15 years. The RS 5 has never been a Car and Driver “Top Ten” pick.

The 718 Cayman was chosen as one of Automobile Magazine’s “All Stars” for 3 of the last 7 years. The RS 5 has never been an “All Star.”

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