2025 Mercedes-Benz GLS-Class vs 2025 Porsche Cayenne Coupe
Comparison Overview
The battle between these two titans pits the luxurious heft of the 2025 Mercedes-Benz GLS-Class against the athletic precision of the 2025 Porsche Cayenne Coupe. The GLS-Class arrives as the king of cavernous comfort, boasting a commanding 205.0 inches in length and delivering a punchier 375 horsepower, though returning a slightly better 21 MPG combined. Conversely, the Cayenne Coupe appeals to the driver who demands dynamic handling, packing 348 horsepower into a more agile, shorter 194.0-inch frame, making it feel instantly more responsive on the road. While the Mercedes offers a practical 17.4 cubic feet of cargo space, the sleeker Porsche surprisingly edges it out with 20.9 cubic feet behind the rear seats. Both demand the same premium unleaded fuel, but the GLS leverages its size for presence, whereas the Cayenne targets sheer driving engagement despite having nearly identical torque figures (369 lb-ft vs. 368 lb-ft).
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Mercedes-Benz GLS-Class
The 2025 Mercedes-Benz GLS-Class offers marginally better fuel economy at 21 MPG combined for the daily grind.
2025 Mercedes-Benz GLS-Class
The larger 205.0-inch length and more traditional SUV profile of the GLS-Class generally imply superior third-row space and comfort.
2025 Porsche Cayenne Coupe
The Porsche Cayenne Coupe's inherently sportier tuning and smaller dimensions promise a sharper, more visceral driving dynamic.
2025 Porsche Cayenne Coupe
The Porsche Cayenne Coupe offers greater cargo capacity at 20.9 cu ft compared to the GLS-Class's 17.4 cu ft for a nearly identical MSRP.
Choose the Mercedes-Benz GLS-Class if...
- You prioritize absolute on-road presence and need the most substantial vehicle, measuring 71.8 inches in height.
- You desire the higher standard horsepower figure, with the GLS producing 375 hp.
- Your driving primarily consists of highway cruising where the smooth 9-speed automatic transmission will shine.
Choose the Porsche Cayenne Coupe if...
- You value agility, given the Cayenne Coupe is significantly shorter at 194.0 inches.
- You need maximum usable cargo space, as 20.9 cu ft beats the GLS’s 17.4 cu ft.
- A sportier, more focused driving feel is paramount, even if it means sacrificing 27 peak horsepower.
Key Dimensions
| Dimension | Mercedes-Benz GLS-Class | Porsche Cayenne Coupe |
|---|---|---|
| Length | 205.0" | 194.0" |
| Width | 79.9" | 78.1" |
| Height | 71.8" | 66.1" |
| Wheelbase | 123.4" | 114.0" |
Features Comparison
Safety
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Blind Spot Monitor | ✓ | ✓ |
| Lane Departure Warning | ✓ | ✓ |
| Lane Keeping Assist System | ✓ | ✓ |
| Front Cross Traffic Alert | ✓ | — |
| 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 |
| Brake Drying | ✓ | — |
| Front Ventilated Disc Brakes | ✓ | ✓ |
| Rear Ventilated Disc Brakes | ✓ | ✓ |
| Brake Preparation System | ✓ | — |
| 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 Power Adjustable Headrests | ✓ | — |
| Rear Headrests | 3 | 2 |
| Rear Height Adjustable Headrests | ✓ | ✓ |
| Rear Center 3-Point Seatbelt | ✓ | — |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Dual Rear Side-Mounted Airbags | — | ✓ |
| Front Integrated Headrests | — | ✓ |
Engine
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Base Engine Displacement | 3.0 L | 3.0 L |
| Number of Cylinders | inline 6 | V6 |
| Base Engine Type | mild hybrid | gas |
| Horsepower | 375 hp @ 5800 rpm | 348 hp @ 5400 rpm |
| Torque | 369 lb-ft @ 1800 rpm | 368 lb-ft @ 1450 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 | Mercedes-Benz | Porsche |
|---|---|---|
| Transmission Type | 9-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain Type | all wheel drive | all wheel drive |
| Center Differential Type | Limited Slip | Limited Slip |
| Hill Descent Control | ✓ | ✓ |
Fuel
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Fuel Type | premium unleaded (required) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 19/24 MPG | 17/23 MPG |
| EPA Fuel Economy (Combined) | 21 MPG | 19 MPG |
| EPA Driving Range (City/Highway) | 452.2/571.2 mi. | 402.9/545.1 mi. |
| Fuel Tank Capacity | 23.8 gal. | 23.7 gal. |
Comfort & Convenience
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| 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 | ✓ | ✓ |
| Front View Camera | ✓ | ✓ |
| Side View Camera | ✓ | ✓ |
| Rear View Camera | ✓ | ✓ |
| Front Parking Sensors | ✓ | ✓ |
| Rear Parking Sensors | ✓ | ✓ |
| Automatic Parking Assist | ✓ | ✓ |
| 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 | ✓ | ✓ |
| Power Rear Seat Easy Entry | ✓ | — |
| Leather Steering Wheel | ✓ | ✓ |
| Four Zone Climate Control | ✓ | — |
| Rear Ventilation Ducts with Fan Control | ✓ | — |
| Interior Air Filtration | ✓ | ✓ |
| Dual Vanity Mirrors | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | ✓ |
| Cruise Control | — | ✓ |
| Dual Zone Climate Control | — | ✓ |
| Rear Ventilation Ducts | — | ✓ |
| Cooled Storage Compartment | — | ✓ |
In Car Entertainment
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Infotainment Display | 12.3 in | — |
| AM/FM Stereo | ✓ | ✓ |
| Premium Speaker Brand | Burmester | — |
| Stereo Power | 590W | 150W |
| Speaker System | 13 | 10 |
| Subwoofer Count | 2 | — |
| Surround Audio | Discrete | — |
| Android Auto (Wireless) | ✓ | — |
| Apple CarPlay (Wireless) | ✓ | — |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | — |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 6 months | 3 months |
| Speed Sensitive Volume Control | ✓ | — |
| Android Auto (Wired) | — | ✓ |
| Apple CarPlay (Wired) | — | ✓ |
| Auxiliary Audio Input | — | ✓ |
Power Feature
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| One-Touch Power Windows | 4 | 4 |
| Moonroof Type | 1st Row Power Glass Extended | 1st Row Fixed Glass Extended |
| Keyless Entry | ✓ | ✓ |
| Reverse Tilt Passenger Mirror | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| 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 | ✓ | — |
| Front Seat Type: Bucket | ✓ | — |
| Driver Seat Power Adjustments | 10-way | 8-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | — |
| Driver Seat Thigh Extension | ✓ | — |
| Driver Seat Memory Settings | 3 | 3 |
| Passenger Seat Power Adjustments | 10-way | 8-way |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Lumbar Support | Power | — |
| Passenger Seat Thigh Extension | ✓ | — |
| Passenger Seat Memory Settings | 3 | — |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Driver Seat Ventilation | ✓ | — |
| Passenger Seat Ventilation | ✓ | — |
| Seat Material: Leather | — | ✓ |
| Front Seat Type: Sport | — | ✓ |
Rearseats
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Rear Head Room | 40.2 in. | — |
| Rear Leg Room | 41.9 in. | — |
| Rear Shoulder Room | 58.5 in. | — |
| Rear Hip Room | 60.0 in. | — |
| Split-Folding Rear Seatback | ✓ | ✓ |
| Reclining Rear Seats | ✓ | — |
| Folding Center Armrest | ✓ | ✓ |
| Power Folding Third Row Seat | ✓ | — |
Tires and Wheels
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Wheel Material | Alloy | Alloy |
| Wheel Size | 21 x 11.0 in. | 20 x 10.5 in. |
| Tire Type | All Season | All Season |
| Tire Size | 315/40R21 | 295/45R20 |
| Spare Tire Type | Temporary | Temporary |
| Spare Tire Location | Inside Mounted | Inside Mounted |
Suspension
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | ✓ | ✓ |
| Rear Stabilizer Bar | ✓ | ✓ |
Warranty
| Feature | Mercedes-Benz | Porsche |
|---|---|---|
| Basic Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Drivetrain Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Hybrid Component Warranty | 6 yr./ 62000 mi. | — |
| Corrosion/Rust Warranty | 4 yr./ 50000 mi. | 12 yr./ unlimited mi. |
| Roadside Assistance | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| EV Battery Warranty | — | 8 yr./ 100000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Mercedes-Benz GLS-Class and 2025 Porsche Cayenne Coupe.
How much more powerful is the Mercedes GLS-Class compared to the base Cayenne Coupe?
The 2025 Mercedes-Benz GLS-Class leads with 375 horsepower, giving it a significant 27 hp advantage over the Cayenne Coupe's 348 horsepower output. However, their torque figures are nearly identical, with the GLS at 369 lb-ft and the Cayenne at 368 lb-ft.
Which crossover is fundamentally better for maximizing cargo hauling?
Surprisingly, the more streamlined 2025 Porsche Cayenne Coupe wins the cargo battle by a noticeable margin. It offers 20.9 cubic feet of space compared to the larger Mercedes GLS-Class’s 17.4 cubic feet, suggesting the Porsche maximizes its shorter length more efficiently for luggage.
Does the size difference affect their city fuel economy ratings?
Yes, the larger Mercedes GLS-Class sacrifices some efficiency due to its size, rating at 19 MPG City, while the slightly smaller Cayenne Coupe manages 17 MPG City but only 23 MPG Highway versus the GLS's 24 MPG Highway.
Are there major differences in their drivetrain hardware?
Both utilize sophisticated All-Wheel Drive systems, but the GLS-Class employs a 9-speed shiftable automatic transmission, while the Cayenne Coupe uses an 8-speed unit, potentially altering the feel of acceleration and gear engagement.
Considering the MSRPs are nearly identical, which offers better overall value?
Value is subjective, but if performance inputs matter most, the Cayenne offers slightly better MPGs for its handling focus, while the GLS provides superior raw power output for virtually the same $89,000 range starting price.
How much bigger is the physical footprint of the Mercedes GLS?
The 2025 Mercedes-Benz GLS-Class is substantially larger than the Porsche, measuring 205.0 inches in length compared to the Cayenne Coupe's 194.0 inches. Furthermore, the GLS stands over five inches taller at 71.8 inches versus the Coupe's 66.1 inches.
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