Compare the2024 Porsche CayenneVS 2024 GMC Hummer EV SUV

Safety
Warranty
Reliability
Fuel Economy and Range
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Cargo Capacity
Towing
Servicing Ease
Ergonomics
Recommendations

Safety

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The Porsche Cayenne has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Hummer EV SUV doesn’t offer knee airbags.

The Cayenne has standard front and rear seat side-impact airbags and head airbags, which act as a forgiving barrier between the passengers and the door. Combined with high-strength steel door beams this system increases protection from broadside collisions. The Hummer EV SUV doesn't offer rear-seat side-impact airbags, only ones for front seat occupants.

The Cayenne has a standard Multi-collision Brake System, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Hummer EV SUV 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.

A passive infrared night vision system optional on the Cayenne 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 Hummer EV SUV doesn’t offer a night vision system.

Both the Cayenne and Hummer EV SUV have Rear Cross Traffic Alert, but the Cayenne has automatic rear cross-traffic braking (automatically applies the brakes) to better prevent a collision when backing near traffic. The Hummer EV SUV’s Rear Cross Traffic Alert doesn’t automatically brake.

Both the Cayenne and the Hummer EV SUV have standard driver and passenger frontal airbags, front side-impact airbags, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and available around view monitors.

Warranty

The Cayenne comes with a full 4-year/50,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The Hummer EV SUV’s 3-year/36,000-mile basic warranty expires 1 year or 14,000 miles sooner.

The Cayenne’s corrosion warranty is 6 years and unlimited miles longer than the Hummer EV SUV’s (12/unlimited vs. 6/100,000).

Reliability

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than GMC vehicles. J.D. Power ranks Porsche above average in long-term dependability. With 30 more problems per 100 vehicles in the first three years of ownership, GMC is rated lower.

From surveys of all its subscribers, Consumer Reports’ January 2024 Auto Issue reports that Porsche vehicles are more reliable than GMC vehicles. Consumer Reports ranks Porsche 16 places higher in reliability than GMC.

Fuel Economy and Range

The Cayenne has a standard locking fuel door which locks and unlocks with the power locks. The Hummer EV SUV doesn’t have a locking charge port. A locking fuel door helps prevent fuel theft and vandalism, such as sugar in the tank and a locking charge port prevents tampering and damage.

Brakes and Stopping

For better stopping power the Cayenne’s front brake rotors are larger than those on the Hummer EV SUV:

	Cayenne	Cayenne CCB	Hummer EV SUV
Front Rotors	14.2 inches	17.3 inches	14 inches
Rear Rotors	13 inches	16.1 inches	14 inches

The Cayenne 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 Hummer EV SUV doesn’t offer ceramic brake rotors.

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

Tires and Wheels

The Cayenne’s standard 255/55R20 front and 295/45R20 rear tires provide better handling because they have a lower 55 series front and 45 series rear profile (height to width ratio) that provides a stiffer sidewall than the Hummer EV SUV’s 70 series tires. The Cayenne’s optional 285/40R22 front and 315/35R22 rear tires have a lower 40 series front and 35 series rear profile than the Hummer EV SUV’s 55 series tires.

For better ride, handling and brake cooling the Cayenne has standard 20-inch wheels. Smaller 18-inch wheels are standard on the Hummer EV SUV.

Suspension and Handling

The Cayenne offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The Hummer EV SUV doesn’t offer an active sway bar system.

The Cayenne offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. GMC doesn’t offer an active suspension on the Hummer EV SUV.

For better maneuverability, the Cayenne Turbo E-Hybrid’s turning circle is 2.3 feet tighter than the Hummer EV SUV 2’s (39.7 feet vs. 42 feet).

Chassis

The Cayenne Turbo E-Hybrid is 1 foot shorter than the Hummer EV SUV, making the Cayenne easier to handle, maneuver and park in tight spaces.

The Cayenne is 8.4 inches narrower than the Hummer EV SUV, making the Cayenne easier to handle and maneuver in traffic.

The Cayenne is 11.4 inches shorter in height than the Hummer EV SUV, making the Cayenne much easier to wash and garage and drive (lower center of gravity).

Passenger Space

The Cayenne has .6 inches more rear headroom and 1.3 inches more rear legroom than the Hummer EV SUV.

Cargo Capacity

The Cayenne’s liftgate lifts up in one piece, completely out of the way of loading and unloading, while sheltering the cargo loading area. The Hummer EV SUV’s swing out door blocks loading from the passenger’s side.

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

Towing

The Cayenne’s standard towing capacity is much higher than the Hummer EV SUV’s (7700 vs. 6000 pounds).

Servicing Ease

A maintenance reminder system is standard on the Cayenne to save the owner time and money by calculating maintenance intervals for oil changes and vehicle inspections based on odometer mileage. This takes the guesswork out of keeping your vehicle in top condition and helps it last longer. GMC doesn’t offer a maintenance reminder on the Hummer EV SUV.

J.D. Power and Associates surveys of service recipients show that Porsche service is better than GMC. J.D. Power ranks Porsche third in service department satisfaction. With a 26% lower rating, GMC is ranked 15th.

Ergonomics

Unlike the driver-only memory system in the Hummer EV SUV, the Cayenne offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle and climate settings and the front passenger seat also adjusts to the new passenger’s preset preferences.

The Cayenne offers an optional heads-up display that projects speed, tachometer, warning 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 Hummer EV SUV doesn’t offer a heads-up display.

The Cayenne’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 Hummer EV SUV’s power windows’ switches have to be held the entire time to close them fully.

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

To improve rear visibility by keeping the rear window clear, the Cayenne has a standard rear wiper. The Hummer EV SUV doesn’t offer a rear wiper.

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 offers available headlight washers to keep headlight output high. The Hummer EV SUV doesn’t offer headlight washers.

To help drivers avoid possible obstacles, the Cayenne offers optional cornering lights to illuminate around corners when the turn signals are activated. The Hummer EV SUV doesn’t offer cornering lights. The Cayenne also offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

To better shield the driver and front passenger’s vision, the Cayenne has standard dual-element sun visors that can block glare from two directions simultaneously. The Hummer EV SUV doesn’t offer secondary sun visors.

Manual rear side window sunshades are available in the Cayenne to help block heat and glare for the rear passengers. The Hummer EV SUV doesn’t offer rear side window sunshades.

Optional air conditioned front and rear seats keep the Cayenne’s passengers comfortable and take the sting out of hot leather in summer. The Hummer EV SUV doesn’t offer air-conditioned seats in the rear.

The Cayenne offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the Hummer EV SUV.

The Cayenne’s optional Active Parking Assistance can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Remote ParkAssist will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The Hummer EV SUV’s automatic parking system does not offer parking by remote control.

Recommendations

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