Kia EV9 vs Rivian R1S: Best Electric 3-Row SUV Comparison
content: Introduction
Finding the perfect electric three-row SUV feels like searching for a unicorn. The options are limited, but two standouts—the Kia EV9 and Rivian R1S—promise premium experiences. After analyzing Edmunds' rigorous testing (including their patented "Three Brians" seating test), we've identified critical differences that impact real-world usability. The EV9 claimed Edmunds' Top Rated Vehicle award, but does the refreshed Rivian dethrone it? We break down interior comfort, technology execution, cargo versatility, and driving dynamics using professional test-track data and lived experience.
Interior Space and Comfort
Seating Configuration and Accessibility
The Kia EV9's captain's chairs revolutionize third-row access. With a simple button press, seats slide forward creating a 12-inch clearance gap—enough for a 6-foot adult to pass comfortably. Rivian's bench seat forces awkward contortions through a narrower passage with higher step-in height. As Edmunds' testers noted: "If you regularly transport adults to the third row, the EV9 makes it painless while the R1S requires gymnastics."
Third-Row Livability
- EV9 Advantages: Each of the six seats features dedicated air vents, USB-C ports, and storage cubbies. Third-row occupants enjoy 34.1 inches of legroom with sculpted cushions that properly support thighs. The "Three Brians Test" confirmed adequate space behind two 6-foot passengers.
- Rivian Limitations: Flat third-row seats lack thigh support with a 33.3-inch legroom measurement. Edmunds testers reported discomfort after 30 minutes due to the high floor position. No charging ports or storage exist in the rear—only cup holders and vents.
Expert Insight: EV9's sliding center console tray transforms into a snack station—a thoughtful touch for families. Rivian counters with third-row heated seats, but omits second-row ventilation available in the Kia.
Technology and Infotainment
Control Interfaces
Both SUVs stumble with climate controls. The EV9 buries rear settings in a steering-wheel-blocked lower screen, while Rivian forces all adjustments through its main display. As one tester observed: "Physical vent controls remain superior for quick adjustments—digital solutions overcomplicate simple tasks."
Connectivity and Charging Tools
- EV9 Strengths: Wireless Apple CarPlay/Android Auto integration meets user expectations. The intuitive menu structure requires minimal learning curve. Critical flaw: Battery preconditioning only activates with native navigation, disabling smartphone routing benefits.
- Rivian Advantages: Real-time charger availability displays and Tesla Supercharger network access (via adapter) double fast-charging options. Camping mode with leveling air suspension appeals to adventurers. Major drawback: No smartphone mirroring forces reliance on Rivian's system.
Professional Verdict: EV9 wins by integrating expected connectivity features. Rivian's charging tools excel, but the lack of CarPlay frustrates daily users. Edmunds rated EV9's safety tech execution "far superior" thanks to consistent lane-change assist and adjustable following distances.
Cargo and Storage
Interior Flexibility
| Kia EV9 | Rivian R1S | |
|---|---|---|
| Behind 3rd Row | 20.2 cu-ft | 17.6 cu-ft |
| Max Cargo | 81.9 cu-ft | 88.2 cu-ft |
| Underfloor Storage | Moderate | Carry-on compatible |
| Frunk | 3.8 cu-ft | 11.1 cu-ft |
EV9's manual cargo straps simplify securing loads, while Rivian requires reaching through doors to raise heavy third-row seats. The R1S's split tailgate benefits tailgating, though its higher load floor complicates heavy item loading.
Storage Innovation
Rivian's massive front trunk (fit tested with multiple backpacks) and powered operation outshine the EV9. However, Kia's sliding second-row console storage provides accessible snack organization during road trips—a small but frequent-use advantage.
Driving Performance and Range
Test Track Results
- Acceleration: Rivian Performance Max hits 60 mph in 3.5 seconds (quarter-mile: 11.8s @ 113 mph). EV9 GT-Line achieves 4.8 seconds to 60 mph (13.7s @ 101 mph).
- Handling: EV9's 0.85g skidpad outperforms Rivian's 0.80g. EV9 also stopped shorter (127 ft vs 133 ft from 60 mph).
- Real-World Range: Edmunds' 70-mph test saw EV9 exceed EPA estimates at 306 miles. R1S Max Pack achieved 386 miles (6% below Rivian's 410-mile claim).
Daily Driving Experience
EV9's fixed suspension delivers superior bump absorption and cabin quietness. Testers noted: "Over broken pavement, the Kia isolates passengers while the Rivian still transmits minor vibrations." Rivian's air suspension enables off-road prowess with 14.9-inch clearance, but on-road manners favor the EV9. The Kia's lighter steering and smaller turning circle aid urban maneuverability.
Technical Note: Rivian's $5,000 Performance Pack adds 132 hp but isn't essential for daily use. Base dual-motor models offer 533 hp—still dominating most ICE SUVs.
Value Assessment
Pricing and Packages
- EV9 GT-Line: Starts at $73,900. Heated/ventilated seats on all rows, head-up display, and premium audio included.
- R1S Performance Max: $98,800 tested. Requires $1,800 for opaque glass roof (essential for heat reduction) and $5,000 Performance Pack.
Subscription Alert: Rivian charges $15/month for streaming services and will monetize safety features later—a concerning trend. EV9 offers one-time $900 performance unlock.
Winner Breakdown
| Kia EV9 | Rivian R1S | |
|---|---|---|
| Interior | 8.5 | 8.0 |
| Tech | 8.5 | 7.5 |
| Cargo | 8.5 | 9.0 |
| Driving | 8.5 | 8.5 |
| Value | 8.0 | 8.0 |
| Overall | 8.6 | 8.4 |
Final Recommendation
The Kia EV9 claims victory with superior passenger comfort, intuitive tech, and family-focused details. Its 306-mile range and $25,000 price advantage make electric luxury accessible. Choose the Rivian R1S only if you need:
- True off-road capability
- Maximum 386-mile range
- Seven-seat bench configuration
Pro Tip: Skip Rivian's Performance Pack and opt for the $79,900 dual-motor standard battery to close the value gap. For most buyers, the EV9 delivers the smarter package—proving electric SUVs can prioritize people over hype.
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