In a world rapidly embracing the new Lexus GX 550, it’s crucial to revisit the legacy and ongoing relevance of the Lexus Gx 460. While the GX 550 represents a significant leap forward, the GX 460 still holds considerable appeal, especially for those who value proven reliability and a classic V8 engine. This comparison delves into the powertrain, driving dynamics, technology, and overall value proposition of both generations, with a special focus on why the GX 460 remains a compelling option in today’s SUV market.
GX 550 vs GX 460
Last week, ClubLexus had the opportunity to test drive the 2024 GX 550 in Arizona, experiencing all six of its trim levels. Our comprehensive First Drive Review is available here, and insights from the Chief Engineer can be found here. However, with a 2023 Lexus GX 460 Luxury grade also available, we seized the chance to conduct a direct comparison: GX 550 vs GX 460.
While our evaluation didn’t include off-road testing for the GX 460, we drove both the Luxury 460 and the Luxury+ 550 on the same road course. This back-to-back experience allowed for a detailed assessment of each generation’s aesthetics, driving feel, maneuverability, and overall performance.
Here are our objective and subjective observations to help you decide: Is the GX 460 still a worthy contender, or is the GX 550 the definitive choice?
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Engine Performance: The Enduring V8 of the GX 460 vs. the Turbo V6 of the GX 550
GX 460 engine
Lexus GX 460 Engine Bay: Showcasing the robust 4.6L V8 engine, a hallmark of reliability and smooth power delivery. 
GX 550 engine
Lexus GX 550 Engine Compartment: Featuring the new 3.4L twin-turbocharged V6 engine, emphasizing modern performance and efficiency.
The GX 460 is powered by the naturally aspirated 4.6L 1UR-FE V8 engine. This engine delivers 301 horsepower at 5,500 rpm and 329 lb.-ft. of torque at 3,500 rpm. While its 0-60 mph time of 7.8 seconds might not be blistering, the GX 460 provides a smooth and effortless driving experience. The V8 engine is known for its durability and refined operation, contributing to the GX 460’s reputation for reliability. Its towing capacity reaches up to 6,500 lbs. For owners prioritizing engine longevity and the classic V8 sound, the GX 460’s powertrain is a significant advantage.
In contrast, the GX 550 departs from the V8 tradition, adopting a 3.4L twin-turbocharged V6 engine, similar in architecture to the one found in the Lexus LX 600 but with modifications. This engine boosts power output to 349 horsepower (between 4,800 and 5,200 rpm) and torque to 479 lb.-ft. (between 2,000 and 3,500 rpm). The result is a quicker 0-60 mph time of 6.5 seconds and significantly improved towing capabilities:
- Premium: 9,063 lbs
- Premium+: 9,041 – 9,063 lbs
- Luxury: 7,844 – 8,020 lbs
- Luxury+: 7,601 – 7,800 lbs
- Overtrail: 9,096 lbs
- Overtrail+: 9,063 lbs
The GX 550’s towing capacity nearly doubles that of the GX 460 in some trims, a substantial upgrade. The twin-turbo V6 offers enhanced responsiveness and low-end torque, making it more suitable for both daily driving and off-road adventures.
However, the long-term reliability of the 3.4L V6, while shared with other Lexus and Toyota models like the LS 500 and Tundra, remains a question mark compared to the proven V8 in the GX 460. To compensate for the V8’s absence, the GX 550 employs engine noise augmentation through the speakers in Sport+ mode, attempting to replicate the V8 rumble. While subjectively decent, it’s not a true replacement for the naturally aspirated V8 experience that GX 460 loyalists appreciate.
Transmission Advancements: 6-Speed in the GX 460 vs. 10-Speed in the GX 550
GX 550 side
Lexus GX 550 Profile: Illustrating the modern design and stance of the new generation, equipped with a 10-speed transmission for optimized performance.
The GX 460 is equipped with a six-speed automatic transmission, featuring sport and manual shifting modes. Its gear ratios are:
- 1st: 3.520
- 2nd: 2.042
- 3rd: 1.400
- 4th: 1.000
- 5th: 0.716
- 6th: 0.586
The GX 550 marks a significant upgrade with a 10-speed automatic transmission, related to the unit in the Lexus LC 500. While tuned differently, it shares core technologies. This new transmission adapts its shifting behavior based on driving modes and includes paddle shifters for manual control. The GX 550’s gear ratios are:
- 1st: 4.923
- 2nd: 3.257
- 3rd: 2.349
- 4th: 1.944
- 5th: 1.532
- 6th: 1.193
- 7th: 1.000
- 8th: 0.801
- 9th: 0.661
- 10th: 0.613
The 10-speed transmission in the GX 550 offers several advantages. The more aggressive first gear ratio improves initial acceleration, and the closer ratios throughout the range ensure smoother transitions and optimized power delivery. Modern 10-speed transmissions are also generally known for their reliability and efficiency, despite their complexity.
While the GX 460’s 6-speed is adequate, the GX 550’s 10-speed transmission is a clear advancement, enhancing both on-road performance and potentially off-road control. This transmission upgrade contributes to a more refined and responsive driving experience in the newer model.
Chassis and Suspension: Enhanced Rigidity and Dynamics in the GX 550
GX 550 vs GX 460
Both the GX 460 and GX 550 utilize a body-on-frame construction, featuring double-wishbone front suspensions and solid rear axles with four-link coilover suspensions. However, the GX 550 benefits from significant chassis and suspension enhancements.
The GX 550 is built on the new GA-F platform, which boasts 20% greater rigidity compared to the GX 460’s platform, while also being lighter. This increased rigidity directly translates to improved body control and a more refined ride quality both on and off-road. For mechanics and owners, a more rigid chassis can also imply better long-term durability and less susceptibility to chassis flex under heavy use.
Furthermore, the GX 550 Overtrail and Overtrail+ trims introduce a new Electronic Kinetic Dynamic Suspension System (E-KDSS). While the original KDSS in the GX 460 was groundbreaking for its time (debuting in 2003), it linked front and rear disconnects and had limited adjustability. E-KDSS allows independent disconnection of front and rear sway bars and is infinitely variable, adapting to vehicle geometry, throttle input, and steering angle. This results in significantly increased wheel articulation, reaching 24.45 inches, improving off-road capability.
Like the GX 460 Luxury, the GX 550 Luxury+, Overtrail, and Overtrail+ grades feature Adaptive Variable Suspension (AVS). However, the GX 550’s AVS is more refined, offering three firmness settings (Comfort, Normal, and Sport) that provide a more noticeable difference. The GX 550 feels more planted and less prone to body roll than the GX 460, particularly in its firmer suspension settings.
Driving Experience: On-Road Refinement and Off-Road Promise
GX 550
Driving the GX 460 Luxury model reveals its strengths: a comfortable and composed ride, especially with its AVS system. However, back-to-back driving with the GX 550 Luxury+ makes the improvements clear. The GX 550 is quicker in acceleration and braking, exhibiting less nose dive under hard braking. Despite its body-on-frame construction, the GX 550 offers a more refined and smoother ride overall.
While the GX 460 provides a traditional SUV feel, the GX 550 leans towards a more European driving dynamic, blending comfort, refinement, and surprisingly agile handling, especially in Normal and Sport AVS modes. It takes the strengths of the GX 460 and elevates them to a new level of sophistication.
The GX 550 represents the best body-on-frame Lexus SUV driving experience to date, feeling more stable and assured than even the larger LX. For daily driving and occasional spirited drives, the GX 550 offers a more engaging and refined experience compared to the GX 460.
Off-Road Capability: GX 460’s Proven System vs. GX 550’s Advanced Features
GX 550 off-road
While a direct off-road comparison wasn’t conducted, examining the specifications reveals the GX 550‘s enhanced off-road potential. Both GX generations feature a locking center Torsen differential with open front and rear differentials, making them inherently capable off-roaders.
However, the GX 550 Overtrail and Overtrail+ trims add a locking rear differential, Multi-Terrain Select (MTS), Downhill Assist Control, Crawl Control with Turn Assist, and a Multi-Terrain Monitor. These features provide greater control and visibility in challenging off-road conditions.
The GX 550 Overtrail grades boast improved off-road geometry:
- Approach Angle: 26 degrees (GX 460: 21 degrees)
- Departure Angle: 22 degrees (GX 460: 23 degrees)
- Breakover Angle: 24 degrees (GX 460: 21 degrees)
- Wading Depth: 27.56 inches
- Wheel Articulation: 24.45 inches (GX 460: 21.06 inches)
- Minimum Ground Clearance: 8.86 inches (GX 460: 8.1 inches)
While the GX 460 is a capable off-roader, the GX 550 Overtrail models are designed to be even more competent straight from the factory, offering advanced technology and improved physical specifications for serious off-road enthusiasts.
Fuel Economy: Marginal Gains with the GX 550
GX 460
The GX 460 is rated at 15 mpg city, 20 mpg highway, and 17 mpg combined.
The GX 550 achieves a slightly better estimated fuel economy of 15 mpg city, 21 mpg highway, and 17 mpg combined.
While the improvement is minimal, the GX 550 provides similar fuel consumption despite offering significantly more power and torque. This near-identical fuel economy is a testament to the efficiency of modern turbocharged engines, though real-world mileage can vary based on driving style and conditions, especially when turbochargers are engaged.
Interior and Amenities: Modern Tech vs. Classic Layout
GX 460 interior
GX 460 Interior: Showcasing the traditional Lexus interior design with a smaller touchscreen and physical controls, emphasizing a familiar and functional layout. 
GX 550 interior
GX 550 Interior: Featuring the modern Lexus interior with a large 14-inch touchscreen, digital instrument cluster, and a more open and minimalist design aesthetic.
Interior dimensions and material quality are comparable between the GX 460 and GX 550. Both Premium (and GX 550 Overtrail) trims offer synthetic leather, while Luxury trims feature genuine leather. However, the interior design and technology differ significantly.
The GX 460’s interior, especially the dashboard, can feel cluttered, particularly the center stack with its integrated touchscreen. In contrast, the GX 550 interior adopts a more open and minimalist design. The dashboard is flatter, window sills are lower, and A-pillars are moved back to improve visibility.
Technology is where the GX 550 truly shines. It features a standard 14-inch Lexus Interface infotainment system with wireless Apple CarPlay and Android Auto, a digital instrument cluster, enhanced safety features, and additional charging ports. While some may prefer the tactile physical buttons of the GX 460’s infotainment and climate controls, the GX 550’s modern system is cleaner and more user-friendly overall. Higher GX 550 trims offer premium features like massaging front seats and a panoramic moonroof with switchable opacity.
Visual Appeal: Subjective Design Shift
GX 550 vs GX 460
Design preference is subjective, but the GX 460‘s large spindle grille is undeniably eye-catching. Lexus’s design direction is evolving towards a more sculpted and minimalist front end, exemplified by the GX 550.
The GX 550’s design is a departure, drawing inspiration from boxy SUVs of the 1980s and 90s, reimagined for the modern era. It presents a more muscular and subtle aesthetic, projecting a rugged and off-road-ready persona. For those who appreciate a blend of retro cues and modern execution, the GX 550’s design is a significant draw.
Pricing and Value: GX 460 as the More Affordable Option
The GX 460, particularly used or remaining new 2023 models, represents a more affordable entry point. New GX 460 Premium models are priced in the low $60,000 range, while Luxury models range from the high $60,000s to mid $70,000s. Used GX 460 Luxury models can be found in the low $60,000s.
The GX 550 commands a higher price. GX 550 Premium models start around $66,000, Overtrail models in the low $70,000s, Overtrail+ just under $80,000, and a fully optioned Luxury+ reaching approximately $85,000.
Generally, the GX 550 is priced about $5,000 to $10,000 higher than a similarly equipped GX 460. For budget-conscious buyers or those prioritizing value, the GX 460 remains an attractive proposition, especially in the used market.
Final Verdict: GX 460’s Enduring Appeal vs. GX 550’s Comprehensive Upgrade
GX 550 vs GX 460
If the allure of a reliable, smooth, and great-sounding naturally aspirated V8 engine is paramount, and a plush, comfortable ride is desired, the GX 460 remains a compelling choice. It also offers a more accessible price point, especially in the used market.
However, from nearly every objective standpoint – towing capacity, acceleration, braking, ride quality, suspension technology, interior amenities, standard features, and off-road capability – the GX 550 is undeniably superior. Even subjective aspects like design are largely in favor of the more modern and muscular GX 550.
Ultimately, the “right” Lexus GX depends on individual priorities. The GX 460 continues to offer value and a classic Lexus experience, while the GX 550 represents a significant step forward, delivering a more refined, capable, and technologically advanced SUV.
Tags: gx 460, GX 550, Lexus GX, Lexus GX 460, Lexus GX 550, GX 550 vs GX 460 Comparison
Michael S. Palmer
Michael S. Palmer began his career assisting and developing content for Academy Award-winning and studio-based film and television producers. He has been a professional writer since 2008, when he joined the Writers Guild of America West (WGAw). As a journalist and Content Editor/Manager, he has covered numerous emerging imaging, theatrical exhibition, home entertainment, and automotive technologies. He currently spends his days creating original content at the Internet Brands Automotive Group for some of the world’s largest online automotive communities, including Ford Truck Enthusiasts, CorvetteForum, ClubLexus, AudiWorld, and LS1Tech. He still owns his first car, a 1987 Mercury Cougar; adores driving his Boss 302 Mustang; and recently teamed with Chevrolet Performance, Holley, Magnaflow, Eaton, Wilwood, Michelin, Chemical Guys, Summit Racing to build his first project car. Installing an LS3 E-ROD Connect & Cruise system into a 1992 Buick Roadmaster Estate Wagon made his eight-passenger wagon faster than a C5 Corvette to 60mph and 50 state emissions legal. His wife and daughter are very patient.
