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Lexus RX vs Acura MDX (2026): Full Comparison

The Lexus RX and Acura MDX occupy overlapping but distinct positions in the luxury SUV market. The RX is a two-row mid-size SUV available with a class-leading hybrid powertrain. The MDX is a three-row mid-size SUV that offers genuine seven-passenger capacity. The question for buyers is straightforward: do you need a third row, or do you want the most refined two-row experience in the segment?

At a Glance

Specification	2026 Lexus RX	2026 Acura MDX
Starting MSRP	~$50,000	~$51,000
Engine	2.4L Turbo I-4 (RX 350)	3.5L V6
Horsepower	~275 hp	~290 hp
Combined MPG	~28 mpg (RX 350) / ~36 mpg (RX 450h+)	~23 mpg
Cargo Space	~29.6 cu ft / ~46.2 cu ft	~18.1 cu ft / ~71.4 cu ft (all seats down)
Seating	5 passengers	6-7 passengers
Warranty	4-year/50,000 mi basic	4-year/50,000 mi basic

The MDX seats up to seven and offers more total cargo volume. The RX counters with superior fuel economy — especially in hybrid form — and a quieter, more polished ride. For a full overview of the segment, visit Best Family SUVs.

Performance

The RX 350 runs a 2.4-liter turbocharged four-cylinder producing approximately 275 horsepower and 317 lb-ft of torque, paired with an eight-speed automatic. AWD is available. The RX 350h adds a hybrid system to a 2.5-liter four-cylinder for approximately 246 combined horsepower and a projected 36 mpg combined — among the best figures in any luxury SUV. The plug-in hybrid RX 450h+ extends this further with approximately 304 combined horsepower and an estimated 37 miles of all-electric range, making short commutes entirely gasoline-free. On the road, the RX prioritizes smoothness over sportiness. The steering is light, the ride is absorbent, and road noise is kept remarkably low through acoustic glass and sound-deadening materials.

The MDX uses a 3.5-liter naturally aspirated V6 producing approximately 290 horsepower and 267 lb-ft of torque, paired with a 10-speed automatic. Front-wheel drive is standard, with SH-AWD available. The MDX feels more substantial than the RX — it is approximately 400 pounds heavier — but the V6 provides smooth, linear power delivery. The MDX Type S raises output to approximately 355 horsepower via a 3.0-liter turbo V6 and includes SH-AWD, adaptive suspension, and Brembo front brakes. The Type S transforms the MDX into one of the most engaging three-row SUVs available, capable of surprising agility for its size.

Fuel economy heavily favors the RX. The RX 350 achieves a projected 28 mpg combined versus the MDX’s 23 mpg. The RX hybrid variants widen the gap further. Use the Fuel Cost Calculator to see what this means over five years of ownership.

Interior and Tech

The RX interior is a masterclass in Lexus refinement. The 14-inch touchscreen is responsive and logically organized, running Lexus’s latest multimedia system with wireless Apple CarPlay, wireless Android Auto, and cloud-based navigation. A 21-speaker Mark Levinson surround-sound system is available and rivals dedicated home audio setups. Materials are exceptional — hand-stitched leather, genuine wood or aluminum trim, and soft-touch surfaces throughout. The two-row layout gives rear passengers approximately 38 inches of legroom and a generous recline angle.

The MDX counters with its third row, which accommodates children comfortably and adults in a pinch. Second-row passengers get approximately 36.7 inches of legroom, and the third row provides approximately 29.6 inches — usable for riders under 5’8” on short trips. Acura’s 12.3-inch center display runs a clean interface with wireless Apple CarPlay. The MDX’s ELS Studio 3D audio system, with 25 speakers including four overhead, is one of the best factory sound systems in any vehicle at any price. Interior materials are strong but sit slightly below the RX’s standard — the MDX cabin is handsome and well-built without matching Lexus’s obsessive attention to tactile quality.

Safety

Both SUVs include robust standard safety packages. The RX features Lexus Safety System+ 3.0 with pre-collision braking (vehicle, pedestrian, cyclist detection), full-speed adaptive cruise control, lane departure alert with steering assist, and proactive driving assist that reads the road ahead and adjusts speed and steering for curves and slower vehicles.

The MDX includes AcuraWatch with adaptive cruise control, lane-keeping assist, road departure mitigation, traffic jam assist, and low-speed braking control. The MDX also offers a traffic jam assist feature that handles steering, acceleration, and braking in stop-and-go traffic on mapped highways.

Both earn top marks from IIHS and NHTSA. The MDX’s additional mass provides some inherent crash protection advantage in real-world collisions, though both SUVs exceed all current federal safety standards by wide margins.

Value and Cost of Ownership

The RX 350 starts at approximately $50,000, and the RX 450h+ plug-in hybrid begins around $57,000. The MDX starts at approximately $51,000, with the Type S reaching approximately $72,000. At base prices, the two are closely matched, but the MDX Type S pushes significantly higher.

Long-term reliability is a strong point for both brands. Lexus and Acura consistently rank at the top of industry reliability surveys. Out-of-warranty maintenance costs are projected at approximately $600 to $1,000 per year for the RX and $700 to $1,100 for the MDX. Both are significantly cheaper to maintain than German luxury SUVs in the same price range.

Depreciation is similar, with both retaining approximately 55-60% of their value after three years. The RX hybrid variants tend to hold slightly stronger residual values due to sustained demand for fuel-efficient luxury SUVs. Calculate monthly payments with the Car Loan Calculator.

Verdict

If you need a third row, the MDX is the clear choice — it is one of the best three-row luxury SUVs on the market. If you do not need a third row, the RX offers a more refined driving experience, better fuel economy (especially in hybrid form), and a marginally more luxurious cabin. Both are outstanding purchases backed by strong reliability records.

Key Takeaways

The MDX seats up to seven passengers; the RX is strictly a five-passenger two-row SUV.
The RX 450h+ plug-in hybrid achieves a projected 36 mpg combined with ~37 miles of electric range — far ahead of the MDX’s ~23 mpg.
Both brands rank at the top of industry reliability surveys with low long-term ownership costs.
The MDX Type S (~355 hp, SH-AWD, Brembo brakes) is the performance pick among three-row luxury SUVs.
Interior quality is strong in both; the RX has a slight edge in materials and cabin quietness.

Next Steps

Compare both to alternatives in Best Family SUVs.
Estimate monthly payments with the Car Loan Calculator.
Review hybrid options in Best Hybrid Cars 2026.
Calculate fuel savings with the Fuel Cost Calculator.

Specifications and pricing are based on manufacturer data available at publication. Verify current details with your dealer.