2025 Mercedes-Benz GLS-Class vs 2026 BMW ALPINA XB7
Comparison Overview
The 2025 Mercedes-Benz GLS-Class captures refined, comfortable three-row luxury starting at an accessible $89,200, boasting a respectable 375 hp and achieving 21 MPG combined. It prioritizes broad appeal and usability over sheer muscle. In dramatic contrast, the 2026 BMW ALPINA XB7 launches itself into hyper-luxury performance territory with a breathtaking 631 hp and 590 lb-ft of torque, transforming the high-riding crossover experience into a genuine speed machine, despite its imposing $156,000 MSRP. The difference is stark: the GLS offers pragmatic power and better fuel economy (19/24 MPG), while the ALPINA presents an almost unrivaled performance surge, giving up 256 horsepower versus the GLS’s base output. For those prioritizing cost savings and efficiency, the GLS is the clear entry point; for those craving staggering acceleration, the XB7 justifies its substantial premium.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Mercedes-Benz GLS-Class
The GLS-Class wins for commuters due to its significantly better combined fuel economy of 21 MPG, which is a massive improvement over the XB7's implied lower rating given the massive power difference.
2026 BMW ALPINA XB7
The ALPINA XB7 offers significantly more utility with 48.6 cu ft of cargo capacity compared to the GLS's 17.4 cu ft, making it better suited for family hauling.
2026 BMW ALPINA XB7
The ALPINA XB7 dominates enthusiasts with a colossal 631 horsepower and 590 lb-ft of torque, dwarfing the GLS's 375 hp output.
2025 Mercedes-Benz GLS-Class
With an MSRP difference exceeding $66,800, the Mercedes-Benz GLS-Class offers excellent luxury packaging for substantially less money.
Choose the Mercedes-Benz GLS-Class if...
- Your budget requires staying under the $90,000 mark, as the GLS starts at $89,200.
- Fuel efficiency is a priority, evidenced by its 21 MPG combined rating.
- You prefer the tried-and-true blend of luxury and capability offered by the standard Mercedes-Benz powertrain producing 375 hp.
Choose the BMW ALPINA XB7 if...
- Ultimate performance is non-negotiable, highlighted by the XB7’s 631 horsepower.
- You require maximum utility, given the XB7’s superior cargo volume of 48.6 cubic feet.
- The driving experience demands supercar-level torque, supplied by the XB7’s massive 590 lb-ft output.
Key Dimensions
| Dimension | Mercedes-Benz GLS-Class | BMW ALPINA XB7 |
|---|---|---|
| Length | 205.0" | 203.9" |
| Width | 79.9" | 78.3" |
| Height | 71.8" | 70.7" |
| Wheelbase | 123.4" | 122.2" |
Features Comparison
Safety
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| 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 | 3 |
| Rear Height Adjustable Headrests | ✓ | ✓ |
| Rear Center 3-Point Seatbelt | ✓ | ✓ |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | — |
| Dual Rear Side-Mounted Airbags | — | ✓ |
Engine
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Base Engine Displacement | 3.0 L | 4.4 L |
| Number of Cylinders | inline 6 | V8 |
| Base Engine Type | mild hybrid | mild hybrid |
| Horsepower | 375 hp @ 5800 rpm | 631 hp @ 5600 rpm |
| Torque | 369 lb-ft @ 1800 rpm | 590 lb-ft @ 1800 rpm |
| Number of Valves | 24 | 32 |
| Camshaft Type | Double overhead cam (DOHC) | Double overhead cam (DOHC) |
| Variable Valve Timing | Variable | Variable |
| Fuel Injection Type | ✓ | ✓ |
Drive Train
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Transmission Type | 9-speed shiftable automatic | 8-speed shiftable automatic |
| Drivetrain Type | all wheel drive | all wheel drive |
| Center Differential Type | Limited Slip | — |
| Hill Descent Control | ✓ | ✓ |
| [object Object] | — | ✓ |
| [object Object] | — | ✓ |
Fuel
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Fuel Type | premium unleaded (required) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 19/24 MPG | — |
| EPA Fuel Economy (Combined) | 21 MPG | — |
| EPA Driving Range (City/Highway) | 452.2/571.2 mi. | 0/0 mi. |
| Fuel Tank Capacity | 23.8 gal. | 21.9 gal. |
Comfort & Convenience
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| 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 | ✓ | ✓ |
| Heated Steering Wheel | — | ✓ |
| Climate Control Zones | — | 5 |
| Extended Cabin Heating/Cooling | — | ✓ |
In Car Entertainment
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Infotainment Display | 12.3 in | 14.9 in |
| AM/FM Stereo | ✓ | ✓ |
| Premium Speaker Brand | Burmester | Harman/Kardon |
| Stereo Power | 590W | 464W |
| Speaker System | 13 | 16 |
| Subwoofer Count | 2 | — |
| Surround Audio | Discrete | Discrete |
| Android Auto (Wireless) | ✓ | — |
| Apple CarPlay (Wireless) | ✓ | — |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 6 months | 12 months |
| Speed Sensitive Volume Control | ✓ | — |
| Android Auto (Wired) | — | ✓ |
| Apple CarPlay (Wired) | — | ✓ |
Power Feature
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| One-Touch Power Windows | 4 | 4 |
| Moonroof Type | 1st Row Power Glass Extended | 1st Row Power Glass Extended |
| Keyless Entry | ✓ | ✓ |
| Reverse Tilt Passenger Mirror | ✓ | ✓ |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Front Head Room | 39.4 in. | 41.9 in. |
| Front Leg Room | 40.3 in. | 39.8 in. |
| Front Shoulder Room | 59.3 in. | 60.0 in. |
| Front Hip Room | 60.8 in. | — |
| Seat Material: Leatherette | ✓ | — |
| Front Seat Type: Bucket | ✓ | — |
| Driver Seat Power Adjustments | 10-way | 12-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | Power |
| Driver Seat Thigh Extension | ✓ | ✓ |
| Driver Seat Memory Settings | 3 | 2 |
| Passenger Seat Power Adjustments | 10-way | 12-way |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Lumbar Support | Power | Power |
| Passenger Seat Thigh Extension | ✓ | ✓ |
| Passenger Seat Memory Settings | 3 | 2 |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Driver Seat Ventilation | ✓ | ✓ |
| Passenger Seat Ventilation | ✓ | ✓ |
| Seat Material: Premium Leather | — | ✓ |
| Front Seat Type: Sport | — | ✓ |
| Driver Seat Manual Adjustments | — | 2-way |
| Passenger Seat Manual Adjustments | — | 2-way |
| Seat Massage Function | — | ✓ |
Rearseats
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Rear Head Room | 40.2 in. | 39.9 in. |
| Rear Leg Room | 41.9 in. | 37.6 in. |
| Rear Shoulder Room | 58.5 in. | 58.1 in. |
| Rear Hip Room | 60.0 in. | — |
| Split-Folding Rear Seatback | ✓ | ✓ |
| Reclining Rear Seats | ✓ | — |
| Folding Center Armrest | ✓ | ✓ |
| Power Folding Third Row Seat | ✓ | ✓ |
| Heated Rear Seats (Multi-Level) | — | ✓ |
Tires and Wheels
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Wheel Material | Alloy | — |
| Wheel Size | 21 x 11.0 in. | 23 x 11.0 in |
| Tire Type | All Season | Performance |
| Tire Size | 315/40R21 | 325/30R |
| Spare Tire Type | Temporary | Temporary |
| Spare Tire Location | Inside Mounted | Inside Mounted |
| Wheel Finish | — | Painted Alloy |
Suspension
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | ✓ | ✓ |
| Rear Stabilizer Bar | ✓ | ✓ |
Warranty
| Feature | Mercedes-Benz | BMW |
|---|---|---|
| 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./ unlimited mi. |
| Complimentary Scheduled Maintenance | — | 3 yr./ 36000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Mercedes-Benz GLS-Class and 2026 BMW ALPINA XB7.
How significant is the performance gap between the GLS-Class and the ALPINA XB7?
The performance gap is immense; the 2026 ALPINA XB7 delivers 631 hp, which is 256 horsepower more than the 2025 Mercedes-Benz GLS-Class’s 375 hp. This means the XB7 offers a far more aggressive, sports-car-like driving dynamic.
What are the real-world implications of the $66,800 price difference?
The $66,800 price discrepancy means the GLS-Class is positioned as a premium luxury vehicle, while the ALPINA XB7 competes in an ultra-high-performance, ultra-luxury niche commanding a much higher barrier to entry at $156,000.
Is the added size of the Mercedes GLS worthwhile for families?
While the GLS is slightly longer at 205.0 inches, the ALPINA XB7 is the superior choice for hauling gear, offering 48.6 cu ft of cargo space compared to the GLS’s mere 17.4 cu ft.
Which vehicle requires premium fuel, and does it affect commuting costs?
Both vehicles require premium unleaded fuel. However, the GLS-Class’s 21 MPG combined rating will result in lower annual fuel expenditure compared to the powerhouse XB7, making the GLS more economical for daily driving.
How do the transmissions differ between these two luxury SUVs?
The Mercedes-Benz GLS-Class utilizes a 9-speed shiftable automatic transmission aimed at smoothness and efficiency. Conversely, the ALPINA XB7 employs an 8-speed shiftable automatic, optimized to handle the massive 590 lb-ft of torque effectively.
Are the exterior dimensions very different for parking and maneuverability?
The dimensions are very similar; the GLS-Class is marginally longer (205.0 inches vs. 203.9 inches) and slightly taller (71.8 inches vs. 70.7 inches), suggesting parking experiences will be nearly identical despite the performance disparity.
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