2025 INFINITI QX80 vs 2026 Mercedes-Benz GLS

$82,450 · SUV

$90,250 · Crossover

Comparison Overview

The 2025 INFINITI QX80 ignites the luxury SUV scene with a massive surge of power, boasting 450 hp and a commanding 516 lb-ft of torque from its new engine setup. Conversely, the 2026 Mercedes-Benz GLS leans into refined, fuel-conscious luxury, offering a more modest 375 hp but achieving superior efficiency with a 21 MPG combined rating. The QX80 commands attention with its imposing 211.2-inch length and a $7,800 lower starting MSRP of $82,450, providing raw muscle off the line. Meanwhile, the GLS prioritizes sure-footedness with standard All-Wheel Drive, though its 17.4 cu ft cargo space trails the QX80's 22 cu ft. For buyers prioritizing immediate acceleration and a lower entry cost, the QX80’s sheer output is the clear draw, while the GLS appeals to those needing better efficiency for daily driving across its slightly shorter 205.0-inch frame.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz GLS

The Mercedes-Benz GLS is the better commuter due to its superior fuel economy, achieving 21 MPG combined compared to the QX80's 18 MPG.

👨‍👩‍👧‍👦 Best for Families

2025 INFINITI QX80

The 2025 INFINITI QX80 offers significantly more usable storage space, boasting 22 cubic feet of cargo capacity versus the GLS's 17.4 cubic feet.

🏎️ Best for Enthusiasts

2025 INFINITI QX80

The QX80 is the enthusiast's choice, delivering an extra 75 horsepower and 147 lb-ft more torque for blistering performance.

💰 Best Value

2025 INFINITI QX80

The INFINITI QX80 undercuts the GLS by $7,800 while offering substantially more horsepower, presenting better outright performance value.

Choose the INFINITI QX80 if...

You demand maximum engine output, benefiting from the 450 hp and 516 lb-ft of torque.
Your budget is tighter, as the QX80 starts $7,800 less than the Mercedes-Benz GLS.
You frequently haul large items, utilizing the class-leading 22 cu ft of cargo volume.

Choose the Mercedes-Benz GLS if...

Fuel economy is paramount, given the GLS's higher 21 MPG combined rating.
You prioritize traction and stability in all weather conditions with standard All-Wheel Drive.
You prefer a slightly more compact footprint, as the GLS is over 6 inches shorter in length (205.0 inches vs 211.2 inches).

Key Dimensions

Dimension	INFINITI QX80	Mercedes-Benz GLS
Length	211.2"	205.0"
Width	83.3"	79.9"
Height	76.6"	71.8"
Wheelbase	121.0"	123.4"

Features Comparison

Safety

Feature	INFINITI	Mercedes-Benz
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
Rear Cross Traffic Alert	✓	✓
Driver Attention Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Third Row 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 Preparation System	✓	✓
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	2	3
Rear Height Adjustable Headrests	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Front Cross Traffic Alert	—	✓
Brake Drying	—	✓
Adaptive Headlights	—	✓
Cornering Lights	—	✓
Front Power Adjustable Headrests	—	✓
Rear Center 3-Point Seatbelt	—	✓

Engine

Feature	INFINITI	Mercedes-Benz
Base Engine Displacement	3.5 L	3.0 L
Number of Cylinders	V6	inline 6
Base Engine Type	gas	mild hybrid
Horsepower	450 hp @ 5600 rpm	375 hp @ 5800 rpm
Torque	516 lb-ft @ 3600 rpm	369 lb-ft @ 1800 rpm
Number of Valves	24	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	INFINITI	Mercedes-Benz
Transmission Type	9-speed shiftable automatic	9-speed shiftable automatic
Drivetrain Type	rear wheel drive	all wheel drive
Center Differential Type	—	Limited Slip
Hill Descent Control	—	✓

Fuel

Feature	INFINITI	Mercedes-Benz
Fuel Type	premium unleaded (recommended)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	16/20 MPG	19/24 MPG
EPA Fuel Economy (Combined)	18 MPG	21 MPG
EPA Driving Range (City/Highway)	377.6/472.0 mi.	452.2/571.2 mi.
Fuel Tank Capacity	23.6 gal.	23.8 gal.

Comfort & Convenience

Feature	INFINITI	Mercedes-Benz
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Front View Camera	✓	✓
Side View Camera	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
Wireless Charging Pad	✓	✓
Adaptive Cruise Control	✓	✓
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
3rd Row Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Overhead Console with Storage	✓	✓
Front Seatback Storage	✓	✓
Manual Rear Seat Easy Entry	✓	—
Leather Steering Wheel	✓	✓
Heated Steering Wheel	✓	—
Three Zone Climate Control	✓	—
Rear Ventilation Ducts with Fan Control	✓	✓
Interior Air Filtration	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Transmission Controls on Steering Wheel	—	✓
Automatic Parking Assist	—	✓
Power Rear Seat Easy Entry	—	✓
Four Zone Climate Control	—	✓

In Car Entertainment

Feature	INFINITI	Mercedes-Benz
Infotainment Display	14.3 in	12.3 in
AM/FM Stereo	✓	✓
Klipsch Speakers	✓	—
Stereo Power	600W	590W
Speaker System	14	13
Subwoofer Count	1	2
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	With Real Time Traffic	✓
Satellite Radio Trial Period	3 months	6 months
Speed Sensitive Volume Control	✓	✓
Premium Speaker Brand	—	Burmester
Surround Audio	—	Discrete

Power Feature

Feature	INFINITI	Mercedes-Benz
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass Extended	1st Row Power Glass Extended
Keyless Entry	✓	✓
Reverse Tilt Dual Mirrors	✓	—
Heated Mirrors	✓	✓
Reverse Tilt Passenger Mirror	—	✓

Frontseats

Feature	INFINITI	Mercedes-Benz
Front Head Room	39.1 in.	39.4 in.
Front Leg Room	43.8 in.	40.3 in.
Front Shoulder Room	64.2 in.	59.3 in.
Front Hip Room	59.9 in.	60.8 in.
Seat Material: Leatherette	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	10-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	3
Passenger Seat Power Adjustments	8-way	10-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Thigh Extension	—	✓
Passenger Seat Thigh Extension	—	✓
Passenger Seat Memory Settings	—	3
Driver Seat Ventilation	—	✓
Passenger Seat Ventilation	—	✓

Rearseats

Feature	INFINITI	Mercedes-Benz
Rear Head Room	37.8 in.	40.2 in.
Rear Leg Room	39.2 in.	41.9 in.
Rear Shoulder Room	63.7 in.	58.5 in.
Rear Hip Room	59.9 in.	60.0 in.
Folding Rear Seatback	✓	—
Reclining Rear Seats	✓	✓
Fixed Center Armrest	✓	—
Heated Rear Seats (Multi-Level)	✓	—
Power Folding Third Row Seat	✓	✓
Split-Folding Rear Seatback	—	✓
Folding Center Armrest	—	✓

Tires and Wheels

Feature	INFINITI	Mercedes-Benz
Wheel Material	Alloy	Alloy
Wheel Size	20 x 8.0 in	21 x 11.0 in.
Tire Type	All Season	All Season
Tire Size	275/60R20	315/40R21
Spare Tire Type	Full Size Non-Matching	Temporary
Spare Tire Location	Underbody Mounted	Inside Mounted

Suspension

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

Warranty

Feature	INFINITI	Mercedes-Benz
Basic Warranty	4 yr./ 60000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	6 yr./ 70000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	7 yr./ unlimited mi.	4 yr./ 50000 mi.
Roadside Assistance	4 yr./ 60000 mi.	4 yr./ 50000 mi.
Complimentary Scheduled Maintenance	3 yr./ 45000 mi.	—
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 INFINITI QX80 and 2026 Mercedes-Benz GLS.

How significant is the performance difference between the 2025 QX80 and the 2026 GLS?

The difference is substantial: the QX80 delivers 450 horsepower and 516 lb-ft of torque. In contrast, the GLS offers 375 horsepower and 369 lb-ft of torque, making the QX80 significantly more potent in acceleration tests.

Which vehicle is more economical for daily driving?

The 2026 Mercedes-Benz GLS is the clear winner for efficiency, rated at 21 MPG combined (19 City/24 Highway). The QX80, requiring premium fuel, is rated lower at 18 MPG combined (16 City/20 Highway).

Does the difference in drive type affect pricing or capability?

Yes, the QX80 comes standard with Rear Wheel Drive and has a lower $82,450 MSRP. The GLS utilizes All Wheel Drive standard but commands a higher price point of $90,250.

How do the dimensions compare for garage fitment and interior room?

The QX80 is longer at 211.2 inches and taller at 76.6 inches, offering a massive 22 cubic feet of cargo room. The GLS is slightly more compact at 205.0 inches long and 71.8 inches high, providing 17.4 cubic feet of storage.