Compare the2025 GMC Hummer EV SUVVS 2025 Rivian R1S

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Hummer EV SUV are reminded to check the back seat if they opened the rear door before starting out. The R1S doesn’t offer a back seat reminder.

Over 200 people are killed each year when backed over by motor vehicles. The Hummer EV SUV has standard Reverse Automatic Braking that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The R1S doesn’t offer backup collision prevention brakes.

The GMC Hummer EV SUV’s Surround Vision has integrated front and rear camera washers, ensuring clear, all-weather visibility without the need for manual cleaning. In contrast, the Rivian R1S lacks camera washers, requiring you to manually clean the cameras for optimal performance.

Both the Hummer EV SUV and the R1S have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, 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, around view monitors, rear cross-path warning and driver alert monitors.

The GMC Hummer EV SUV weighs 1847 to 2438 pounds more than the Rivian R1S. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

There are almost 34 times as many GMC dealers as there are Rivian dealers, which makes it much easier should you ever need service under the Hummer EV SUV’s warranty.

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that GMC vehicles are better in initial quality than Rivian vehicles. With 65 fewer problems per 100 vehicles, JD Power ranks GMC higher than Rivian.

From surveys of all its subscribers, Consumer Reports’ March 2025 Auto Issue reports that GMC vehicles are more reliable than Rivian vehicles. Consumer Reports ranks GMC 2 places higher in reliability than Rivian.

The Hummer EV SUV has more powerful engines than the R1S:

As tested in Motor Trend the Hummer EV SUV 3X is faster than the R1S Dual Motor Performance:

For better stopping power the Hummer EV SUV’s brake rotors are larger than those on the R1S:

For better traction, the Hummer EV SUV has larger tires than the R1S (305/55R22 vs. 275/60R20). The Hummer EV SUV’s tires are larger than the largest tires available on the R1S (305/55R22 vs. 275/50R22).

The GMC Hummer EV SUV’s wheels have 8 lugs for longer wheel bearing life, less chance of rotor warping and greater strength. The Rivian R1S only has 5 wheel lugs per wheel.

The Hummer EV SUV has a standard full size spare so a flat doesn’t interrupt your trip. A full size spare costs extra on the R1S. Without the option you must depend on a temporary spare, which has mileage and speed limitations, or roadside assistance and a tow-truck.

For a smoother ride and more stable handling, the Hummer EV SUV’s wheelbase is 5.6 inches longer than on the R1S (126.7 inches vs. 121.1 inches).

For better handling and stability, the track (width between the wheels) on the Hummer EV SUV is 5.3 inches wider in the front and 5.3 inches wider in the rear than on the R1S.

For better maneuverability, the Hummer EV SUV’s turning circle is 5.9 feet tighter than the R1S Quad Max Ascend’s (35.4 feet vs. 41.3 feet). The Hummer EV SUV’s turning circle is 7.9 feet tighter than the R1S’ (35.4 feet vs. 43.3 feet).

For greater off-road capability the Hummer EV SUV has a 1.3 inches greater minimum ground clearance than the R1S (16 vs. 14.7 inches), allowing the Hummer EV SUV to travel over rougher terrain without being stopped or damaged.

For excellent aerodynamics, the Hummer EV SUV has standard flush composite headlights. The R1S has recessed headlights that spoil its aerodynamic shape and create extra drag.

The Hummer EV SUV has 1.4 inches more front headroom, 4.2 inches more front legroom, 5.6 inches more front hip room, 3.3 inches more front shoulder room, 2.4 inches more rear legroom, 6 inches more rear hip room and 5.1 inches more rear shoulder room than the R1S.

The Hummer EV SUV has a much larger cargo volume than the R1S with its rear seat up (35.9 vs. 17.6 cubic feet).

A standard locking glovebox keeps your small valuables safer in the Hummer EV SUV. The R1S doesn’t offer locking storage for small valuables.

The Hummer EV SUV’s standard towing capacity is much higher than the R1S’ (10,000 vs. 7700 pounds).

The Hummer EV SUV’s standard Keyless Open and Start allow you to unlock the doors from any outside door handle, open the cargo door, and start the vehicle, all without removing the key from the pocket or purse. An advanced key system standard on the R1S doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear door.

The Hummer EV SUV’s standard side window demisters help clear frost or condensation from the side windows in the winter. The R1S doesn’t even offer side window demisters, so the driver may have to wipe the windows from the outside to gain side vision.

When the Hummer EV SUV is put in reverse, both rearview mirrors tilt from their original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirrors into their original positions. The R1S’ mirrors don’t automatically adjust for backing.

The Hummer EV SUV’s Enhanced Automatic Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The R1S doesn’t offer an automated parking system.