2025 INFINITI QX55 vs 2026 Acura MDX

$50,150 · Crossover

$51,800 · Crossover

Comparison Overview

Deciding between sleek style and traditional spaciousness can be tough when choosing a premium crossover. The 2025 INFINITI QX55 leans into a sportier profile, starting at an MSRP of $50,150 with 268 hp, while the 2026 Acura MDX, priced slightly higher at $51,800, offers a more robust structure. The QX55 beats the MDX significantly on efficiency, delivering a 25 MPG combined versus the MDX's 22 MPG combined, thanks in part to its slightly smaller footprint (186.3 inches long vs. 198.4 inches). However, the MDX has an edge in raw power with 290 hp. Despite the size difference, the QX55 boasts superior utility, offering 26.9 cu ft of cargo space compared to the MDX's 18.1 cu ft, which is surprising given the MDX's greater length. Ultimately, buyers must weigh the QX55's efficiency and practical cargo space against the MDX's extra horsepower and larger overall dimensions.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 INFINITI QX55

The INFINITI QX55 wins for commuters due to its better fuel economy, achieving 25 MPG combined versus the MDX's 22 MPG combined.

👨‍👩‍👧‍👦 Best for Families

2026 Acura MDX

The larger 2026 Acura MDX is better suited for families, featuring greater overall dimensions (198.4 inches long) even though it sacrifices cargo space in this base configuration.

🏎️ Best for Enthusiasts

2026 Acura MDX

Enthusiasts will appreciate the 2026 Acura MDX's higher output of 290 horsepower compared to the QX55's 268 hp.

💰 Best Value

2025 INFINITI QX55

The QX55 offers better overall value by providing more cargo capacity (26.9 cu ft) while undercutting the MDX's starting price.

Choose the INFINITI QX55 if...

You prioritize efficiency, as the QX55 manages 28 MPG on the highway versus the MDX's 26 MPG highway rating.
You need usable daily cargo space; the QX55 provides 26.9 cubic feet, significantly more than the MDX's 18.1 cu ft.
You prefer a slightly more manageable size for city driving, measuring 186.3 inches in length.

Choose the Acura MDX if...

You want the highest power figure, as the MDX delivers 290 horsepower, which is 22 hp more than the QX55.
You prefer the traditional feel and responsiveness of a 10-speed shiftable automatic transmission over a CVT.
Your primary usage is FWD and you desire a physically larger vehicle, as the MDX is over 12 inches longer than the QX55.

Key Dimensions

Dimension	INFINITI QX55	Acura MDX
Length	186.3"	198.4"
Width	74.9"	78.7"
Height	63.8"	67.9"
Wheelbase	110.2"	113.8"

Features Comparison

Safety

Feature	INFINITI	Acura
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
Rear Cross Traffic Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Dual Rear Side-Mounted Airbags	✓	—
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Ventilated Disc Brakes	✓	—
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Front Fog Lights	✓	—
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Driver Attention Alert	—	✓
Third Row Head Airbags	—	✓
Rear Solid Disc Brakes	—	✓

Engine

Feature	INFINITI	Acura
Base Engine Displacement	2.0 L	3.5 L
Number of Cylinders	inline 4	V6
Base Engine Type	gas	gas
Horsepower	268 hp @ 5600 rpm	290 hp @ 6200 rpm
Torque	280 lb-ft @ 4800 rpm	267 lb-ft @ 4700 rpm
Number of Valves	16	24
Camshaft Type	Double overhead cam (DOHC)	Single overhead cam (SOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓
Cylinder Deactivation	—	✓

Drive Train

Feature	INFINITI	Acura
Transmission Type	continuously variable-speed automatic	10-speed shiftable automatic
Drivetrain Type	all wheel drive	front wheel drive
Center Differential Type	Limited Slip	—

Fuel

Feature	INFINITI	Acura
Fuel Type	premium unleaded (recommended)	premium unleaded (recommended)
EPA Fuel Economy (City/Highway)	22/28 MPG	19/26 MPG
EPA Fuel Economy (Combined)	25 MPG	22 MPG
EPA Driving Range (City/Highway)	352.0/448.0 mi.	351.5/481.0 mi.
Fuel Tank Capacity	16.0 gal.	18.5 gal.

Comfort & Convenience

Feature	INFINITI	Acura
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Rear Parking Sensors	✓	—
Wireless Charging Pad	✓	✓
Adaptive Cruise Control	✓	✓
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Dual Zone Climate Control	✓	—
Rear Ventilation Ducts	✓	—
Dual Vanity Mirrors	✓	—
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Power Rear Seat Easy Entry	—	✓
Three Zone Climate Control	—	✓
Rear Ventilation Ducts with Fan Control	—	✓
Interior Air Filtration	—	✓

In Car Entertainment

Feature	INFINITI	Acura
Infotainment Display	8.0 in	12.3 in
AM/FM Stereo	✓	✓
Speaker System	6	11
Android Auto (Wired)	✓	—
Apple CarPlay (Wired)	✓	—
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	—
Satellite Radio Trial Period	3 months	—
Android Auto (Wireless)	—	✓
Apple CarPlay (Wireless)	—	✓
Speed Sensitive Volume Control	—	✓

Power Feature

Feature	INFINITI	Acura
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass	1st Row Power Glass Extended
Keyless Entry	✓	✓
Reverse Tilt Dual Mirrors	✓	✓
Heated Mirrors	✓	✓

Frontseats

Feature	INFINITI	Acura
Front Head Room	39.9 in.	38.5 in.
Front Leg Room	39.6 in.	41.6 in.
Front Shoulder Room	57.9 in.	61.9 in.
Front Hip Room	55.6 in.	59.3 in.
Seat Material: Leather	✓	—
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	3
Passenger Seat Power Adjustments	8-way	8-way
Passenger Seat Height Adjustment	✓	✓
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Seat Material: Leatherette	—	✓
Passenger Seat Lumbar Support	—	Power

Rearseats

Feature	INFINITI	Acura
Rear Head Room	36.9 in.	38.1 in.
Rear Leg Room	38.7 in.	38.5 in.
Rear Shoulder Room	57.1 in.	60.3 in.
Rear Hip Room	53.8 in.	57.8 in.
Split-Folding Rear Seatback	✓	✓
Reclining Rear Seats	✓	✓
Folding Center Armrest	✓	✓
Manual Folding Third Row Seat	—	✓

Tires and Wheels

Feature	INFINITI	Acura
Wheel Finish	Painted Alloy	—
Wheel Diameter	20 in.	—
Tire Size	255/45R20	255/55R19
Run Flat Tires	✓	—
Wheel Material	—	Alloy
Wheel Size	—	19 x 8.5 in
Tire Type	—	All Season

Suspension

Feature	INFINITI	Acura
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	✓
Rear Stabilizer Bar	✓	✓

Warranty

Feature	INFINITI	Acura
Basic Warranty	4 yr./ 60000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	6 yr./ 70000 mi.	6 yr./ 70000 mi.
Corrosion/Rust Warranty	7 yr./ unlimited mi.	5 yr./ unlimited mi.
Roadside Assistance	4 yr./ 60000 mi.	4 yr./ 50000 mi.
Complimentary Scheduled Maintenance	3 yr./ 22500 mi.	1 yr./ 12000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 INFINITI QX55 and 2026 Acura MDX.

Which vehicle is more fuel-efficient for my daily drive?

The 2025 INFINITI QX55 is the clear winner for efficiency, achieving a 25 MPG combined rating versus the 2026 Acura MDX's 22 MPG combined. Commuting in the QX55 will save you more trips to the premium unleaded pump.

How significant is the difference in power output between the two?

The 2026 Acura MDX holds a moderate advantage with 290 horsepower, compared to the QX55's 268 horsepower. While both use recommended premium fuel, the MDX offers a noticeable 22 hp increase.

If I frequently haul gear, which crossover has more space?

Despite its sportier coupe-like roofline, the QX55 offers significantly more practical cargo volume at 26.9 cubic feet. The larger Acura MDX surprisingly yields only 18.1 cubic feet in this comparison.

What is the primary mechanical difference affecting the driving feel?

The QX55 utilizes a continuously variable-speed automatic transmission (CVT), which prioritizes smooth, efficient operation. Conversely, the MDX features a 10-speed shiftable automatic, which often appeals more to drivers seeking distinct gear changes.

Are both models similarly priced for the base models?

They are quite close, with the 2025 QX55 starting at $50,150 and the 2026 MDX starting at $51,800. This near $1,650 difference makes the QX55 slightly easier on the initial budget.

Does the drivetrain configuration differ between the two?

Yes, the standard configuration for the QX55 listed is All-Wheel Drive, while the base 2026 MDX reviewed here comes with Front Wheel Drive, which is an important distinction for varied weather conditions.