2022 Acura MDX Vs. RDX: The Key Differences Explained

The mid-size 2022 MDX was completely redesigned; the compact 2022 RDX gained some updates. Here's how they compare based on size differences, styling, performance, and interior.

Acura SUVs have been consistently popular and praised since their release in the early- to mid-2000s. For 2022, the mid-size MDX SUV enters its 4th generation with a substantial overhaul inside and out, versus the compact Acura RDX crossover gaining some updates, including refined styling inline with its larger MDX sibling, a much quieter cabin, more standard technology, and a retuned suspension.

Aside from size and being on the market for some time (MDX since 2001 and RDX since 2007), what are the other key MDX vs RDX differences? Here’s a closer look.

Acura MDX Vs. RDX Size Dimensions Compared

2022 Acura MDX
2022 RDX. Photo: Acura
2022 Acura RDX
2022 RDX. Photo: Acura

Of course, the first thing that one would notice is the difference in size. These are both classed as crossover SUVs, but the Acura RDX is more compact than the Acura MDX. The exterior of the RDX is about 10 inches (254mm) shorter and 4 inches (102mm) narrower than the MDX. Here’s a look at the MDX vs RDX exterior size dimensions for 2022:

2022 Acura MDX Dimensions:

Wheelbase (in)111.0
Length (in)196.2
Width (in)77.7
Height (in)67.4
Track (in, front/rear)66.3  / 66.3
Ground Clearance (in, unladen)7.3

2022 Acura RDX Dimensions:

Length (in)186.8
Width (in)74.8
Height (in)65.7
Wheelbase (in)108.3
Track (in, front/rear)64.2  / 64.7
Ground Clearance (in, unladen)8.2

Acura MDX Styling: 2022 exterior changes are significant

2022 Acura MDX silver
2022 Acura MDX. Photo: Russell Purcell

The difference is more pronounced when we get to the 2022 MDX interior, but more on that further below. In terms of visuals, the 2022 Acura RDX is somewhat more angular, sporty, and dynamic in design and tends to turn more heads. The lines are sharper and more contemporary.

The outgoing MDX exterior was a little more underwhelming but has received a significant overhaul for the 2022 model year in which it “undergoes its most radical design transformation yet,” according to Acura. However, before the 2022 MDX arrived, the 2021 model still relied on a facelifted design from 2019.

2022 Acura MDX
2022 Acura MDX. Photo: Russell Purcell

Generally, the 2022 MDX’s design updates include a more vigorous and upright front look, a more sculpted grille and hood, and a broader stance that suits this mid-size hauler better than the previous generation. For a better idea of styling and performance, here’s our 2022 MDX Platinum Elite review.

Acura RDX Styling: 2022 design changes are subtle but much-needed

2022 Acura RDX

The 2019 year brought us a whole new generation of sporty RDX compact SUV design (here’s our 2019 RDX review), but even a few years later, the design can look dated, if you want to call it that. Fortunately, the refreshed 2022 RDX does gain some styling updates that are more sporty and dynamic and inspired by the new, next-gen MDX, which is also now Acura’s flagship SUV. If we were going to buy the older RDX, it would be the 2021 Acura RDX PMC Edition, limited to 360 units with its blacked-out accents and NSX orange look.

Engine, Performance, and Power Differences

Spec2022 MDX2022 RDX
Engine3.5L V6 (updated)2.0L Turbo
Power290-hp @ 6200272-hp @ 6500
Torque (lb-ft @ rpm)267 @ 4700280 @ 1600-4500
Valvetrain24-Valve, SOHC i-VTEC16-Valve, DOHC VTEC
Transmission10-Speed Automatic Transmission (new)10-Speed Automatic Transmission

Larger MDX gains updated transmission

2022 Acura MDX engine
2022 Acura MDX. Photo: Russell Purcell

2022 MDX:

The new model gains an advanced 3.5L direct-injected i-VTEC V6 engine putting down 290 peak horsepower and 267 lb.-ft. peak torque. For the first time, the new 3.5L V6 pairs to an updated 10-speed automatic transmission with Sequential SportShift and standard paddle shifters. Both FWD and AWD drivetrains are offered for 2022 (3.5L V6 + 10AT
Front Wheel Drive and 3.5L V6 + 10AT Super Handling All-Wheel Drive).

Red 2022 MDX SH-AWD A-Spec Performance driving on road
2022 MDX SH-AWD A-Spec Performance. Photo: Acura

2021 MDX:

What the MDX might lack in exterior looks, it makes up for in engines and on-road performance. Many have remarked that the more powerful 3.5L V6 gasoline or 3.0L V6 hybrid options help make the MDX a much more fun SUV to drive, even though it’s larger and more family-oriented.

Normally, it happens the other way around. The gasoline MDX outputs up to 290 hp, and the powertrain is paired with a 6- or 9-speed automatic transmission. The hybrid only pairs with a 7-speed DCT but gets up to 321 hp combined.

Smaller RDX Gains Improved Handling Features

2022 Acura RDX
2022 RDX. Photo: Acura

2022 RDX:

The refreshed RDX keeps the same engine but improves driving dynamics and handling for 2022. This includes an updated Integrated Dynamics System offering a sportier driving feel between its four driving modes. Coupled with the returned optional Adaptive Damper System with more response in Sport mode, it is a more comfortable ride in Comfort mode, according to Acura. The RDX A-Spec also gains a sleeker flat-bottom sport steering wheel.

2021 RDX:

2021 RDX PMC Edition
2021 RDX PMC Edition. Photo: Acura

The RDX has a smaller 2.0L turbocharged four-cylinder engine, but it shouldn’t be counted out on power. Even with a significantly smaller engine, the RDX still gets up to 272 hp, and that 2.0L engine is paired with a 10-speed automatic transmission.

It’s fast off the mark, clearing 0-100km/h in 6.6 seconds, but that acceleration and deft quickness get less pleasing when you reach highway speeds. It takes a full 5.2 seconds to go from 80 to 112km/h. The MDX gets 0-100km/h in just 6.3 seconds, and its power and agility remain much more consistent when hitting the highways.

MDX Vs. RDX Towing Capacity

If towing capacity is an important factor in performance for prospective buyers, they should know that the RDX can manage about 1,500 lbs (680 kg), and the MDX 3.5L gasoline V6 model can handle far more, up to 5,000 lbs (2,268 kg). One thing to watch out for, however, is that Acura doesn’t recommend any towing at all on the MDX hybrid model.

Acura MDX Vs. RDX Interior Differences and Dimensions

2022 Acura MDX interior
2022 Acura RDX
2022 Acura RDX interior

The first big difference is that the 2022 RDX interior has two rows of seating, holding up to 5 passengers, whereas the MDX adds a third row, taking capacity up to 7 passengers.

Cargo volume depends on how you make use of the seats. The RDX has a better natural cargo area of 29.5 cubic feet (835 liters) with the second row up and 58.9 cubic feet (1668 liters) with the second-row seats down. The MDX only gets 15.8 cubic feet (447 liters) initially, but when you open up the rear cabin, you get a huge 90.9 cubic feet (2574 liters).

2022 Acura MDX
2022 Acura MDX. Photo: Russell Purcell

Here’s our full 2022 Acura RDX interior review.

The 2022 MDX interior updates include extra cabin real estate for people and gear, more passenger space in all three rows, and a new multi-function second row with a removable middle seat.

The RDX and MDX are similar in that they offer some pleasing features, including impressive lists of standard safety features and driver assistance systems. The MDX and RDX get a forward-collision warning, automated emergency braking, lane-departure warning, lane keep assist, and adaptive cruise control.

2022 Acura RDX
2022 Acura RDX interior. Photo: Acura

2022 MDX and RDX interior dimensions:

These interior specs are in inches for the 1st row, 2nd row, and 3rd row.

SpecAcura MDXAcura RDX
Headroom38.1 / 38.2 / 35.640  / 38
Legroom41.4 / 38.4 / 26.642  / 38
Shoulder Room61.1 / 59.1 / 54.760  / 57
Hiproom57.5 / 57.8 / 40.655 / 50
EPA Passenger Volume (cu ft)133.4104

Takeaway

mdx vs rdx 2022
2022 MDX and RDX. Photos: Acura

So, which one is the better choice? Well, the obvious takeaway is the size difference and what each provides. The compact RDX is small and sleek and benefits from a punchy turbo engine. But it’s compact, so if cargo space is important, the RDX probably won’t cut it, depending on your family size.

The MDX has been on the market for two decades and offers that third row with all the extra cargo space and a larger cabin environment. And if towing duties are essential, the 2022 MDX will pull up to 5,000 lbs, which aligns with the competitors. The RDX isn’t a weekend toy hauler. Above all, the 2022 MDX is completely new inside and out, while the RDX got a styling update to look more like its larger sibling.

Finally, and as you might expect, the 2022 RDX currently retails from $39,300 ($38,400 in 2021), whereas the 2022 MDX starts at a pricier $46,900 (compared to $44,500 in 2021). The MDX price gets very high when you factor in premium trims and optional extras.

Are you shopping for a used SUV? Here are some 2023 SUV models worth waiting for.

Get the Goods

Join our newsletter - special projects, gear collaborations, new cars & more.

By submitting your email, you agree to our Terms and Privacy Policy and to receive email correspondence from us.
Author:
News Editor
News Editor
Bringing the latest news including release dates, pricing announcements, product updates. With some glossy concepts and special edition rides in the mix.