Lexus RX vs Acura MDX: Which Should You Buy? (2026) — A 36-MPG Hybrid Against a Seven-Seat Top Safety Pick

Two Japanese luxury crossovers within about $1,200 of each other on price, and a long way apart on mileage, seating and crash-test results.

Two Japanese luxury crossovers have been fighting over the same driveway for a quarter century, and in 2026 they have drifted further apart than their sticker prices suggest. The Lexus RX is a two-row, five-seat SUV that now leans on hybrids: its 350h version is rated 36 mpg combined by the EPA. The Acura MDX is a longer, three-row, seven-seat SUV with a V6 and a different safety record. The base prices sit within about $1,200 of each other, which is why shoppers keep cross-shopping them. The rest of the comparison is a series of trade-offs, and this piece lays them out with numbers.

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Introducing the RX | Lexus (Lexus)YouTube ↗

The short answer

Buy the Lexus RX if you want the lowest fuel bill in the class and a quieter, softer luxury experience, and you can live with two rows of seats. Buy the Acura MDX if you need a third row, want the better crash-test record, or want a V6 with a genuine performance option in the Type S. Both are priced so heavily by trim that the real gap shows up once you add packages.

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The Acura MDX: Built-InYouTube ↗

Price: closer than you would think

The RX 350 starts at $51,225 in front-wheel drive and $52,825 with all-wheel drive, according to the Cars.com trim listing for 2026. The hybrid RX 350h, which is all-wheel drive only, starts at $53,525. The range climbs through Premium, Premium+, F Sport Design and Luxury to $63,545 for an RX 350 Luxury AWD and $64,245 for an RX 350h Luxury. The sporty F Sport Handling AWD is $60,000. Cars.com does not say whether those figures include the destination charge, and dealer sites quote slightly different totals, so confirm the out-the-door number before comparing.

The 2026 MDX starts at $51,800 in front-wheel drive, per Cars.com, with SH-AWD at $54,000. Packages stack from there: Technology at $57,200 (FWD) or $59,400 (AWD), A-Spec at $62,400, Advance at $66,900, A-Spec Advance at $68,900, and the Type S with the Advance package at $75,850. Cars.com's own review text puts the base price at $53,150 including a $1,350 destination charge, so the $51,800 figure appears to exclude it.

Line up the all-wheel-drive entry points and the RX 350 AWD at $52,825 is about $1,175 below the MDX SH-AWD at $54,000. Put the hybrid up against the MDX and the RX 350h costs about $475 less than the MDX SH-AWD while delivering far better mileage. At the top of each range the picture flips: a fully loaded RX is cheaper than the MDX Type S, but the Type S is a different kind of vehicle.

Engines and what they are like to live with

The RX has three real choices. The RX 350 uses a 2.4-liter turbocharged four-cylinder making 275 hp and 317 lb-ft of torque, with an eight-speed automatic. The RX 350h pairs a 2.5-liter four with electric motors for 246 hp and 232 lb-ft, always with all-wheel drive. The RX 500h is a turbo-hybrid performance version rated at 27 mpg combined by the EPA. The turbo four has plenty of low-rev torque, which Wikipedia lists as available from 1,700 rpm, and that is what makes the RX feel effortless around town.

The MDX uses a 3.5-liter naturally aspirated V6 with 290 hp and 267 lb-ft of torque and a 10-speed automatic. It is a smooth, familiar engine, but it makes its torque higher in the rev range than the RX's turbo, and it is thirstier. The Type S swaps in a 3.0-liter turbo V6 with 355 hp and 354 lb-ft, which is the most powerful engine in this comparison by a wide margin. If you want an SUV that is enjoyable on a back road, the Type S is the only choice here, and Acura does not have a rival hybrid to offer.

Fuel economy: the biggest gap in the comparison

This is where the two diverge most. According to the EPA's fueleconomy.gov data for the 2026 model year:

RX 350h AWD: 37 mpg city, 34 highway, 36 combined. RX 350 FWD: 22/29/25. RX 350 AWD: 21/28/24. RX 500h AWD: 27/28/27. MDX FWD: 19/26/22. MDX AWD: 19/25/21. MDX Type S: 17/21/19. All of these run on premium fuel.

Compare the like-for-like all-wheel-drive versions and the RX 350 gets 24 mpg combined against the MDX's 21. The hybrid widens it to 15 mpg. As a rough illustration, at 15,000 miles a year the RX 350h burns about 417 gallons and the MDX AWD about 714, a difference of nearly 300 gallons annually. At an assumed $3.50 a gallon of premium, which is our figure and not an EPA one, that is roughly $1,040 a year, or more than $5,000 over five years. That gap alone more than covers the RX 350h's small price premium over the RX 350.

Size and seating

The MDX is the bigger vehicle. Its wheelbase is 113.8 inches and its length 198.4 inches, against 112.2 and 192.5 for the RX, according to Wikipedia's specification tables. That is 1.6 inches more between the axles and almost six inches overall. The extra length goes to a third row, which is standard on every MDX trim, so the Acura seats seven. The RX is a five-seater; Lexus now sells the bigger three-row TX for buyers who need more seats.

The third row in any midsize luxury SUV is best treated as a place for children or short trips, and the MDX is no exception, but having it is the difference between a vehicle that can carry a carpool and one that cannot. Owners who will never fold up those seats are better served by the RX's calmer, more spacious-feeling two-row layout. For towing, the MDX is rated at 3,500 pounds as standard, rising to 5,000 pounds with the transmission cooler that Acura sells as an accessory for AWD models.

Safety: the clearest point for the MDX

The Insurance Institute for Highway Safety lists the 2026 Acura MDX as a Top Safety Pick. The MDX earns Good ratings in the small overlap front test and the updated side test, an Acceptable in the updated moderate overlap front test, and Good for its headlights. The RX does not carry the award. Its IIHS page shows a Good in the small overlap and side tests and a Good for headlights, but a Poor in the updated moderate overlap front test, and the IIHS rating applies to 2023 to 2027 models. The RX does have standard pedestrian automatic emergency braking and standard rear automatic braking, while the MDX offers rear automatic braking only as an option.

For a family buyer that Poor rating is the single most important line in this article. It does not mean the RX is unsafe on the road, but it is the kind of result the IIHS uses to decide who is on its award list, and the MDX is on it while the RX is not.

Warranty, sales and ownership

Acura's warranty, per Cars.com, is four years or 50,000 miles basic and six years or 70,000 miles on the powertrain, with five years of corrosion coverage. We did not verify Lexus's equivalent terms for this article, so check them against the Acura figures before deciding.

On sales the RX is the clear winner. Wikipedia's tables show 113,256 RX units sold in the US in 2025 (down from 118,636 in 2024), including 43,259 hybrids and 5,873 plug-in hybrids, against 41,460 MDX sales. The RX outsells the MDX by roughly two and a half to one, and the hybrid alone sold more than the entire MDX line. Sales do not prove a better vehicle, but they do suggest the RX has the broader audience and a stronger resale base, which is worth weighing if you plan to sell in three or four years.

Which should you buy

Choose the RX 350h if fuel cost is a priority, if you drive mostly in town, and if you want the quiet, comfortable luxury crossover the badge has always meant. Choose the RX 350 if you want strong low-speed punch from the turbo four without the hybrid's price step. Choose the MDX SH-AWD if you need seven seats, towing capacity, or the Top Safety Pick result. Choose the MDX Type S, at $75,850 with the Advance package, only if you value driving fun above fuel economy, and accept 19 mpg combined as the price of that.

For most American families the decision comes down to two questions: do you need a third row, and how much does the IIHS result matter to you? If the answer to both is yes, the MDX. If you want the lowest running costs, the RX hybrid is hard to beat in this price range.

Both vehicles may see model-year updates. Lexus has announced the 2027 RX arrives at dealers this fall, and we have not seen official 2027 MDX pricing, so shoppers who are not in a hurry should confirm what the new model year changes before signing.

Spec comparison

2026 Lexus RX

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2026 Acura MDX

	2026 Lexus RX	2026 Acura MDX
Starting price (AWD)	$52,825 (RX 350); $53,525 (RX 350h)	$54,000 (SH-AWD)
Engine	2.4L turbo 4-cyl, 275 hp / 2.5L hybrid 4-cyl, 246 hp	3.5L V6, 290 hp (Type S: 3.0L turbo V6, 355 hp)
Torque	317 lb-ft (350) / 232 lb-ft (350h)	267 lb-ft (Type S: 354 lb-ft)
EPA combined mpg	24 (350 AWD) / 36 (350h AWD)	21 (AWD) / 19 (Type S)
Seats	5	7
Wheelbase / length	112.2 in / 192.5 in	113.8 in / 198.4 in
IIHS	Moderate overlap front: Poor; no award	2026 Top Safety Pick
US sales, 2025	113,256	41,460