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Is the Lexus RX bigger than the Acura MDX?

No — in current models, the Acura MDX is larger overall than the Lexus RX, with more interior space and a three-row configuration in most trims. The RX is smaller and prioritizes a refined two-row experience, though the RX L adds a third row with limited space.


Size and dimensions


Key exterior footprints help illustrate which SUV occupies more road space. The MDX generally sits on a longer wheelbase and a longer body than the standard RX, contributing to a roomier cabin. The RX L extends the RX lineup with a longer body, but even so, it remains smaller overall than the MDX.



  • Exterior length and wheelbase: The Acura MDX is longer and rides on a longer wheelbase than the Lexus RX in its standard configuration. The RX L is longer than the standard RX, but still typically shorter than the MDX.

  • Width and overall footprint: Both SUVs are close in width, but the MDX’s larger footprint translates to more interior space and easier ingress/egress in the back seats.

  • Seating footprint: The MDX ships as a three-row SUV in most trims, while the RX is a two-row SUV unless you opt for the RX L.


In practical terms, the MDX presents a larger exterior envelope and a more expansive interior, especially when considering third-row usability.


Interior space and seating


Interior capacity and seating configurations are central to the size question. The MDX is designed as a three-row SUV with seating for up to seven or six, depending on the seating arrangement. The RX standard model is a two-row five-seater, with the RX L offering a third row that is best for occasional passengers rather than daily use.



  • Seating capacity: MDX typically accommodates up to seven (or six with captain’s chairs) in a standard three-row layout; RX is five seats in standard form, with RX L adding a third row.

  • Third-row usability: MDX’s third row is usable for adults or older children in many configurations, while the RX L’s third row is more suitable for kids or shorter trips.

  • Passenger space: The MDX generally provides more overall interior volume, especially in the third row and second row, contributing to a more spacious feel inside.


Overall, the MDX offers greater practical seating and passenger space, particularly when the third row is in use.


Cargo and everyday practicality


Cargo capacity and versatility are practical tests of size. With three rows in play, the MDX typically yields more maximum cargo space than the RX when the third row is folded, and even with two rows in use, the MDX tends to offer a larger cargo area. The RX L, while extending cargo options slightly, remains less spacious than the MDX in most configurations.



  • Cargo behind the third row: The MDX generally provides more cargo space behind the third row than the RX L does behind its third row (and far more than the standard RX behind its second row).

  • Cargo with all rows folded: The MDX usually yields a larger maximum cargo area when both rows are folded, versus the RX L or standard RX configurations.

  • Practical daily use: For families needing frequent three-row use or substantial cargo, the MDX tends to be more versatile.


Practically speaking, if cargo flexibility and third-row usefulness are priorities, the MDX leads the comparison.


Bottom line


Across current model years, the Acura MDX is the bigger SUV overall, with more interior space, a true three-row layout, and greater cargo versatility. The Lexus RX is smaller, offers a refined two-row experience, and provides an optional RX L variant for limited third-row seating. Your choice should hinge on whether you value maximum interior space and seating (MDX) or a more compact, passenger-friendly two-row with a rare third-row option (RX L).


Summary


In the size race between the Lexus RX and Acura MDX, the MDX comes out ahead on footprint, seating capacity, and cargo flexibility. The RX remains a stylish, smaller alternative focused on comfort and efficiency, with the RX L adding a compromise third row that does not match the MDX’s roominess. For buyers prioritizing space, the MDX is the bigger choice; for those prioritizing a more compact luxury crossover with a lighter footprint, the RX fits better.

Which is more prestigious, Acura or Lexus?


Reputation and Price Range
Lexus, a Toyota luxury brand division, is best known for its quality and reliability. The overall lineup is considered more elegant than Acura. They offer smoother aesthetics, dynamic ride, and steering feel, and some sports models like the LC and RC-F have improved overall performance.



Is the Acura MDX larger than the Lexus RX 350?


Is the Lexus RX 350 bigger than the Acura MDX? The Lexus RX 350 is a spacious two-row SUV with five seats, while the three-row Acura MDX is a bigger SUV. The Acura MDX has a seven-passenger seating capacity. The vehicle provides more seats but offers less headroom than the Lexus RX 350 in the first and second rows.



What Lexus is equivalent to Acura MDX?


The main Lexus competitor to the Acura MDX is the Lexus TX, as both are midsize, three-row luxury SUVs. However, the Lexus RX is often compared to the MDX because it is a popular luxury crossover, with the long-wheelbase RX 350L offering a third row of seats to make it a closer match. 
You can watch this video to compare the Acura MDX with Lexus TX and Infiniti QX60: 51sEdmunds CarsYouTube · Aug 21, 2025

Lexus TX Acura MDX
Body style Three-row SUV Three-row SUV
Primary comparison Direct competitor Primary comparison target
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You can watch this video to compare the 2025 Lexus RX with Acura MDX and Mazda CX-70: 1mCar Help CornerYouTube · Oct 2, 2024
Key differences between the TX and MDX
This video discusses the differences between the Lexus TX and Acura MDX: 57sBen HardyYouTube · Nov 10, 2025
  • Performance: Both models are known for offering smooth rides and comfort, though some reviews suggest the MDX has a sportier feel, while the TX is geared more towards adventure.
  • Towing: The Lexus TX has a higher towing capacity.
  • Technology: Both have advanced tech, but the MDX includes Google built-in and a more responsive infotainment system, while the Lexus has a larger infotainment screen and a digital key option.
  • Cargo and comfort: The MDX has more second-row legroom and a significantly larger cargo space behind the second row. 

Key differences between the RX and MDX
  • Body style: The standard Lexus RX is a two-row SUV, while the standard MDX is a three-row SUV. 
  • Seating: The MDX offers more passenger seating, but the Lexus RX can have up to seven seats with the long-wheelbase version (RX 350L). 
  • Cargo space: The MDX generally has more cargo space behind the second row than the RX. 
  • Performance: The MDX comes with a 3.5L V6 engine, while the RX uses a turbo 4-cylinder engine. 



What Acura is comparable to Lexus RX?


2025 Acura MDX Comparison. The Lexus RX and Acura MDX have long stood in adjacent corners of the luxury SUV market, each offering unique takes on comfort, technology, and utility. For 2025, the rivalry continues, with both models emphasizing their strengths and addressing their few previous weaknesses.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.