2025 Porsche Cayenne vs 2026 Mercedes-Benz GLS

$84,700 · Crossover

$90,250 · Crossover

Comparison Overview

Trying to choose between the dynamic 2025 Porsche Cayenne and the imposing 2026 Mercedes-Benz GLS often comes down to size versus driving feel. While the Cayenne starts lower at an MSRP of $84,700 compared to the GLS’s $90,250, the initial savings might be offset by running costs, as the Cayenne only manages 19 combined MPG versus the GLS’s slightly better 21 combined MPG. Interestingly, despite costing less, the Cayenne delivers a spirited 348 hp, slightly trailing the GLS’s 375 hp, though both require premium fuel. Size matters considerably: the GLS is substantially longer at 205.0 inches versus the Cayenne’s 194.1 inches, which also gives the larger Benz an edge in passenger capacity, though its cargo area shrinks to 17.4 cu ft compared to the Cayenne's healthy 27.3 cu ft. Deciding between nimble agility and sheer presence is the core challenge here.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Porsche Cayenne

The slightly smaller footprint and marginally better maneuverability of the 2025 Porsche Cayenne make it the marginally easier daily driver in tighter urban environments.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz GLS

The 2026 Mercedes-Benz GLS wins for families due to its significantly larger overall dimensions (205.0 inches long) suggesting superior three-row space, despite having less dedicated cargo room (17.4 cu ft).

🏎️ Best for Enthusiasts

2026 Mercedes-Benz GLS

The 2026 Mercedes-Benz GLS offers 27 more horsepower (375 hp vs 348 hp) and an extra gear in its transmission (9-speed vs 8-speed), providing a theoretical performance edge.

💰 Best Value

2025 Porsche Cayenne

The 2025 Porsche Cayenne presents better value by offering a $5,550 lower starting MSRP while still providing substantial utility and power.

Choose the Porsche Cayenne if...

You prioritize maximizing cargo space, as the Cayenne offers 27.3 cu ft compared to the GLS's 17.4 cu ft.
You want to save $5,550 upfront, as the Cayenne starts at $84,700.
You prefer a slightly nimbler vehicle footprint, measuring 194.1 inches in length versus the GLS's 205.0 inches.

Choose the Mercedes-Benz GLS if...

You frequently travel with more than four passengers and need the advantage of a larger SUV platform.
You want the highest available horsepower figure, with the GLS boasting 375 hp.
You value the slightly superior fuel economy of 21 combined MPG over the Cayenne's 19 combined MPG.

Key Dimensions

Dimension	Porsche Cayenne	Mercedes-Benz GLS
Length	194.1"	205.0"
Width	78.1"	79.9"
Height	66.9"	71.8"
Wheelbase	114.0"	123.4"

Features Comparison

Safety

Feature	Porsche	Mercedes-Benz
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	✓	✓
Adaptive Headlights	✓	✓
Daytime Running Lights	✓	✓
Cornering Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Multi-Adjustable Headrests	✓	—
Rear Headrests	3	3
Rear Multi-Adjustable Headrests	✓	—
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Front Cross Traffic Alert	—	✓
Driver Attention Alert	—	✓
Third Row Head Airbags	—	✓
Brake Drying	—	✓
Brake Preparation System	—	✓
Front Power Adjustable Headrests	—	✓
Rear Height Adjustable Headrests	—	✓

Engine

Feature	Porsche	Mercedes-Benz
Base Engine Displacement	3.0 L	3.0 L
Number of Cylinders	V6	inline 6
Base Engine Type	gas	mild hybrid
Horsepower	348 hp @ 5400 rpm	375 hp @ 5800 rpm
Torque	368 lb-ft @ 1450 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	Porsche	Mercedes-Benz
Transmission Type	8-speed shiftable automatic	9-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
Center Differential Type	Limited Slip	Limited Slip
Hill Descent Control	✓	✓

Fuel

Feature	Porsche	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	17/23 MPG	19/24 MPG
EPA Fuel Economy (Combined)	19 MPG	21 MPG
EPA Driving Range (City/Highway)	402.9/545.1 mi.	452.2/571.2 mi.
Fuel Tank Capacity	23.7 gal.	23.8 gal.

Comfort & Convenience

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

In Car Entertainment

Feature	Porsche	Mercedes-Benz
Infotainment Display	12.3 in	12.3 in
AM/FM Stereo	✓	✓
Stereo Power	150W	590W
Speaker System	10	13
Android Auto (Wired)	✓	—
Apple CarPlay (Wired)	✓	—
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	6 months
Premium Speaker Brand	—	Burmester
Subwoofer Count	—	2
Surround Audio	—	Discrete
Android Auto (Wireless)	—	✓
Apple CarPlay (Wireless)	—	✓
Speed Sensitive Volume Control	—	✓

Power Feature

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

Frontseats

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

Rearseats

Feature	Porsche	Mercedes-Benz
Split-Folding Rear Seatback	✓	✓
Reclining Rear Seats	✓	✓
Folding Center Armrest	✓	✓
Rear Head Room	—	40.2 in.
Rear Leg Room	—	41.9 in.
Rear Shoulder Room	—	58.5 in.
Rear Hip Room	—	60.0 in.
Power Folding Third Row Seat	—	✓

Tires and Wheels

Feature	Porsche	Mercedes-Benz
Wheel Material	Alloy	Alloy
Wheel Size	20 x 10.5 in.	21 x 11.0 in.
Tire Type	All Season	All Season
Tire Size	295/45R20	315/40R21
Spare Tire Type	Temporary	Temporary
Spare Tire Location	Inside Mounted	Inside Mounted

Suspension

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

Warranty

Feature	Porsche	Mercedes-Benz
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	12 yr./ unlimited mi.	4 yr./ 50000 mi.
Roadside Assistance	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Porsche Cayenne and 2026 Mercedes-Benz GLS.

Which SUV is better for hauling large amounts of gear between these two models?

The 2025 Porsche Cayenne is the clear winner for dedicated cargo hauling, providing 27.3 cubic feet of storage space. The 2026 Mercedes-Benz GLS offers significantly less with only 17.4 cubic feet behind its third row.

Since both require premium unleaded fuel, how big is the difference in running costs?

The difference is moderate; the Cayenne gets 19 combined MPG, while the GLS achieves 21 combined MPG. Over a year of driving, the GLS will likely consume slightly less fuel overall.

Is the power difference between the two vehicles noticeable in everyday driving?

While the GLS has 375 hp compared to the Cayenne's 348 hp, the actual real-world difference might be minor given the higher curb weight of the larger GLS. Both provide ample power for merging and highway passing.

How much more expensive is the 2026 Mercedes-Benz GLS initially?

The GLS has a higher starting MSRP of $90,250, putting it $5,550 above the Cayenne's entry price of $84,700.

Does the 2025 Porsche Cayenne handle city driving better than the GLS?

Yes, the Cayenne’s shorter length of 194.1 inches makes it generally easier to navigate and park in dense city centers compared to the significantly longer 205.0-inch GLS.

Are there any transmission advantages in these luxury crossovers?

The 2026 Mercedes-Benz GLS utilizes a 9-speed automatic transmission, giving it a slight theoretical advantage in smoothness or efficiency compared to the Cayenne’s 8-speed automatic.