2025 INFINITI QX80 vs 2025 Mercedes-Benz GLS-Class

$82,450 · SUV

$89,200 · Crossover

Comparison Overview

The most significant numerical divergence between the 2025 INFINITI QX80 and the 2025 Mercedes-Benz GLS-Class lies in performance specifications, where the QX80 boasts a substantial 75 horsepower advantage (450 hp vs. 375 hp) and 147 lb-ft more torque (516 lb-ft vs. 369 lb-ft). Conversely, the GLS-Class offers a 3 MPG advantage in combined fuel economy (21 MPG vs. 18 MPG) and a $6,750 lower starting MSRP ($82,450 vs. $89,200). Dimensionally, the QX80 is significantly larger, measuring 211.2 inches in length compared to the GLS-Class’s 205.0 inches, resulting in greater maximum cargo volume at 22.0 cu ft versus 17.4 cu ft. While both utilize 9-speed automatics, the QX80 utilizes RWD while the GLS-Class comes standard with AWD, which aids its efficiency slightly despite lower output.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Mercedes-Benz GLS-Class

The GLS-Class is preferred for commuting due to its superior combined fuel economy rating of 21 MPG and standard All-Wheel Drive.

👨‍👩‍👧‍👦 Best for Families

2025 INFINITI QX80

The QX80 provides more usable space with 22.0 cu ft of cargo capacity and a larger overall exterior footprint.

🏎️ Best for Enthusiasts

2025 INFINITI QX80

The QX80 is the clear performance choice, delivering 450 horsepower and 516 lb-ft of torque compared to the GLS-Class's lower outputs.

💰 Best Value

2025 INFINITI QX80

The QX80 offers 75 more horsepower for a $6,750 lower initial MSRP.

Choose the INFINITI QX80 if...

Maximum engine output is a priority, given the 450 hp and 516 lb-ft of torque.
You require the largest maximum cargo volume, offering 22.0 cubic feet.
A lower initial purchase price of $82,450 is essential for your budget.

Choose the Mercedes-Benz GLS-Class if...

Fuel efficiency is critical, as it achieves 21 combined MPG versus 18 MPG for Car 1.
Standard All-Wheel Drive capability is non-negotiable for traction.
A slightly more compact exterior size is preferable for maneuverability in tight urban areas.

Key Dimensions

Dimension	INFINITI QX80	Mercedes-Benz GLS-Class
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 2025 Mercedes-Benz GLS-Class.

How much does the performance gap affect the price difference between these two SUVs?

The 2025 QX80 produces 75 more horsepower and costs $6,750 less than the GLS-Class, suggesting the QX80 offers significantly better power-per-dollar.

Which vehicle has better real-world driving economy?

The GLS-Class is rated higher across the board with 19/24 MPG City/Highway (21 Combined), compared to the QX80's 16/20 MPG City/Highway (18 Combined), translating to fewer fuel stops.

Is the Mercedes GLS-Class smaller than the Infiniti QX80?

Yes, the QX80 is physically larger in every dimension, being 6.2 inches longer (211.2 in vs. 205.0 in) and over 4.5 inches taller (76.6 in vs. 71.8 in).