2020 Porsche Cayenne Coupe vs. 2020 Rolls-Royce Cullinan

Detailed Review, Specifications & Comparison

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2020 Rolls-Royce Cullinan

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Safety

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Both the Cayenne Coupe and the Cullinan have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, rearview cameras, available night vision systems, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

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The Cayenne Coupe’s corrosion warranty is 8 years longer than the Cullinan’s (12 vs. 4 years).

There are over 5 times as many Porsche dealers as there are Rolls-Royce dealers, which makes it much easier should you ever need service under the Cayenne Coupe’s warranty.

Engine

© 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 2020/07/10

The Cayenne Turbo S E-Hybrid Coupe’s 4.0 turbo V8 hybrid produces 78 more horsepower (670 vs. 592) than the Cullinan Black Badge’s optional 6.8 turbo V12.

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 2020/07/10

On the EPA test cycle the Cayenne Coupe running on electricity gets better fuel mileage than the Cullinan:

MPGe

Cayenne Coupe

Electric Motor

45 city/37 hwy

Cullinan

MPG

6.8 turbo V12

12 city/20 hwy

On the EPA test cycle the Cayenne Coupe running its gasoline engine gets better fuel mileage than the Cullinan:

MPG

Cayenne Coupe

E-Hybrid 3.0 turbo V6

20 city/22 hwy

3.0 turbo V6

19 city/23 hwy

S 2.9 turbo V6

18 city/22 hwy

Turbo 4.0 turbo V8

15 city/19 hwy

Cullinan

6.8 turbo V12

12 city/20 hwy

The Cayenne Turbo S E-Hybrid Coupe can drive on battery power alone for up to 31 miles. The Cullinan must run its internal combustion engine to move.

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

In heavy traffic or at stoplights the Cayenne Coupe’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 Cullinan doesn’t offer an automatic engine start/stop system.

Transmission

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For more complete vehicle control the Cayenne Coupe has Tiptronic, with the available convenience of an automatic transmission and the complete gear control of a manual transmission without the inconvenience of a clutch. Tiptronic allows the driver to eliminate unwanted shifts and maximize engine braking by down shifting while cornering. The Cullinan doesn’t offer a transmission that allows complete gear control.

The Cayenne Coupe’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 Cullinan doesn’t offer launch control.

Brakes and Stopping

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The Cayenne Coupe offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The Cullinan doesn’t offer ceramic brake rotors.

The Cayenne Coupe Turbo has standard air brakes, which adjust the spoiler automatically during high-speed braking in order to shorten stopping distances. The Cullinan doesn’t offer air brakes.

Tires and Wheels

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For better traction, the Cayenne Coupe has larger standard tires than the Cullinan (F:275/45R20 & R:305/40R20 vs. 255/50R21). The Cayenne Coupe’s optional tires are larger than the largest tires available on the Cullinan (F:285/40R21 & R:315/35R21 vs. 255/50R21).

The Cayenne Coupe’s standard 275/45R20 front and 305/40R20 rear tires provide better handling because they have a lower 45 series front and 40 series rear profile (height to width ratio) that provides a stiffer sidewall than the Cullinan’s standard 50 series tires. The Cayenne Coupe’s optional 285/35R22 front and 315/30R22 rear tires have a lower 35 series front and 30 series rear profile than the Cullinan’s optional 45 series tires.

The Cayenne Coupe has a standard space-saver spare (not available on E-Hybrid) so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the Cullinan; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.

Suspension and Handling

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For better maneuverability, the Cayenne Coupe’s turning circle is 3.6 feet tighter than the Cullinan’s (39.8 feet vs. 43.4 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 2020/07/10

The Porsche Cayenne Coupe may be more efficient, handle and accelerate better because it weighs about 400 to 1400 pounds less than the Rolls-Royce Cullinan.

The Cayenne Coupe is 1 foot, 4.1 inches shorter than the Cullinan, making the Cayenne Coupe easier to handle, maneuver and park in tight spaces.

For excellent aerodynamics, the Cayenne Coupe has standard flush composite headlights. The Cullinan has recessed headlights that spoil its aerodynamic shape and create extra drag.

Cargo Capacity

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The Cayenne Coupe’s standard rear seats fold to accommodate long and bulky cargo. The Cullinan w/Executive Rear Seats doesn’t offer folding rear seats.

The Cayenne Coupe’s liftgate lifts up in one piece, completely out of the way of loading and unloading, while sheltering the cargo loading area. The Cullinan’s tailgate’s top part raises up, but the bottom part lowers, getting in the way of loading and making an uneven surface for sliding cargo.

To make loading groceries and cargo easier when your hands are full, the Cayenne Coupe’s available liftgate can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The Cullinan doesn’t offer a hands-free gesture to open its tailgate, forcing you to put cargo down if your hands are full.

Ergonomics

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The Cayenne Coupe’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 Cullinan does not have an oil pressure gauge.

The Cayenne Coupe’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Cullinan’s rear power window switches have to be held the entire time to close them fully.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The Cayenne Coupe offers available headlight washers to keep headlight output high. The Cullinan doesn’t offer headlight washers.

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 2020/07/10

Consumer Reports® recommends the Porsche Cayenne Coupe, based on reliability, safety and performance.

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