2025 BMW M8 Gran Coupe vs 2026 Mercedes-Benz S-Class

$140,000 · Sedan

$119,500 · Sedan

Comparison Overview

So, you're caught between brute force and ultimate luxury when comparing the 2025 BMW M8 Gran Coupe and the 2026 Mercedes-Benz S-Class? This choice often comes down to prioritizing thrills over sensible refinement. The M8 brings raw performance, boasting 617 hp and 553 lb-ft of torque, directly challenging the S-Class's more reserved 442 hp. However, this power comes at a cost: the M8 delivers only 17 combined MPG, while the S-Class sips fuel more frugally at 23 combined MPG. Furthermore, the price gap is significant, with the M8 starting at $140,000 compared to the S-Class's $119,500 MSRP—a $20,500 difference. While the M8 is slightly shorter at 200.9 inches versus the S-Class’s 209.5 inches, the Mercedes offers a notably taller profile at 59.2 inches for potentially better headroom.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz S-Class

The 2026 Mercedes-Benz S-Class wins for commuting due to its superior fuel economy of 23 combined MPG versus the M8's 17 combined MPG.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz S-Class

The S-Class is better suited for families as it is slightly taller (59.2 inches) and offers a generally more comfort-oriented ride philosophy.

🏎️ Best for Enthusiasts

2025 BMW M8 Gran Coupe

The 2025 BMW M8 Gran Coupe is the choice for enthusiasts, offering a massive 175 hp advantage with 617 hp available.

💰 Best Value

2026 Mercedes-Benz S-Class

The S-Class provides significantly better value by saving the buyer $20,500 in upfront MSRP while delivering better efficiency.

Choose the BMW M8 Gran Coupe if...

You absolutely must have the segment-leading power, evidenced by the M8's 617 hp.
You prioritize a slightly smaller exterior footprint, with the M8 measuring 200.9 inches in length.
You seek the maximum torque available in this comparison, hitting 553 lb-ft.

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

Fuel efficiency matters, as the S-Class achieves 29 MPG on the highway compared to the M8's 22 MPG highway rating.
You want to save over $20,000 upfront, with the S-Class MSRP at $119,500.
You prefer a taller vehicle for ease of entry/exit, as the S-Class stands 59.2 inches high.

Key Dimensions

Dimension	BMW M8 Gran Coupe	Mercedes-Benz S-Class
Length	200.9"	209.5"
Width	76.5"	75.6"
Height	55.9"	59.2"
Wheelbase	119.2"	126.6"

Features Comparison

Safety

Feature	BMW	Mercedes-Benz
Lane Departure Warning	✓	✓
Driver Attention Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front 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
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	✓	✓
Self-Leveling Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Fixed Headrests	✓	—
Rear Headrests	2	3
Rear Integrated Headrests	✓	—
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Blind Spot Monitor	—	✓
Lane Keeping Assist System	—	✓
Front Cross Traffic Alert	—	✓
Rear Cross Traffic Alert	—	✓
Dual Rear Side-Mounted Airbags	—	✓
Cornering Lights	—	✓
Front Power Adjustable Headrests	—	✓
Rear Multi-Adjustable Headrests	—	✓

Engine

Feature	BMW	Mercedes-Benz
Base Engine Displacement	4.4 L	3.0 L
Number of Cylinders	V8	inline 6
Base Engine Type	gas	mild hybrid
Horsepower	617 hp @ 6000 rpm	442 hp
Torque	553 lb-ft @ 1800 rpm	413 lb-ft
Number of Valves	32	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	BMW	Mercedes-Benz
Transmission Type	8-speed shiftable automatic	9-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
[object Object]	✓	—
[object Object]	✓	—
Center Differential Type	—	Limited Slip

Fuel

Feature	BMW	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	15/22 MPG	20/29 MPG
EPA Fuel Economy (Combined)	17 MPG	23 MPG
EPA Driving Range (City/Highway)	301.5/442.2 mi.	400.0/580.0 mi.
Fuel Tank Capacity	20.1 gal.	20.0 gal.

Comfort & Convenience

Feature	BMW	Mercedes-Benz
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	✓	✓
Rear View Camera	✓	✓
Wireless Charging Pad	✓	✓
Cruise Control	✓	—
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Heated Steering Wheel	✓	—
Four Zone Climate Control	✓	—
Rear Ventilation Ducts with Fan Control	✓	—
Interior Air Filtration	✓	✓
Extended Cabin Heating/Cooling	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Front View Camera	—	✓
Side View Camera	—	✓
Front Parking Sensors	—	✓
Rear Parking Sensors	—	✓
Automatic Parking Assist	—	✓
Adaptive Cruise Control	—	✓
Overhead Console with Storage	—	✓
Wood Trim on Steering Wheel	—	✓
Dual Zone Climate Control	—	✓
Rear Ventilation Ducts	—	✓
Sun Sensor	—	✓

In Car Entertainment

Feature	BMW	Mercedes-Benz
Infotainment Display	12.3 in	12.8 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Harman/Kardon	Burmester
Stereo Power	464W	710W
Speaker System	16	15
Surround Audio	Discrete	Discrete
Android Auto (Wired)	✓	—
Apple CarPlay (Wired)	✓	—
USB Port	✓	✓
Auxiliary Audio Input	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	12 months	6 months
Subwoofer Count	—	2
Android Auto (Wireless)	—	✓
Apple CarPlay (Wireless)	—	✓
Speed Sensitive Volume Control	—	✓

Power Feature

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

Frontseats

Feature	BMW	Mercedes-Benz
Front Head Room	40.6 in.	42.1 in.
Front Leg Room	42.1 in.	41.4 in.
Front Shoulder Room	57.2 in.	59.6 in.
Seat Material: Premium Leather	✓	—
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	12-way	12-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Thigh Extension	✓	✓
Driver Seat Memory Settings	2	3
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Passenger Seat Thigh Extension	✓	✓
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: Bucket	—	✓
Passenger Seat Power Adjustments	—	12-way
Passenger Seat Memory Settings	—	3
Seat Massage Function	—	✓

Rearseats

Feature	BMW	Mercedes-Benz
Rear Head Room	37.1 in.	39.4 in.
Rear Leg Room	36.6 in.	43.8 in.
Rear Shoulder Room	54.6 in.	59.0 in.
Split-Folding Rear Seatback	✓	—
Folding Rear Seat Feature	✓	—
Pass-Thru Center Armrest	✓	—
Folding Center Armrest	—	✓

Tires and Wheels

Feature	BMW	Mercedes-Benz
Wheel Finish	Painted Alloy	—
Wheel Size	20 x 10.5 in.	19 x 8.5 in
Tire Type	Performance	—
Tire Size	285/35R Y	255/45R19
Wheel Material	—	Alloy
Run Flat Tires	—	✓

Suspension

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

Warranty

Feature	BMW	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./ unlimited mi.	4 yr./ 50000 mi.
Complimentary Scheduled Maintenance	3 yr./ 36000 mi.	—
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 BMW M8 Gran Coupe and 2026 Mercedes-Benz S-Class.

What is the real-world performance difference between these two sedans?

The difference is substantial: the BMW M8 produces 617 hp and 553 lb-ft of torque, whereas the Mercedes-Benz S-Class offers a lower output of 442 hp and 413 lb-ft of torque, making the M8 significantly faster in a straight line.

How much more expensive is the M8 compared to the S-Class?

The 2025 BMW M8 Gran Coupe carries an MSRP of $140,000, which is $20,500 more than the starting price of the 2026 Mercedes-Benz S-Class at $119,500.

Does the difference in MPG affect long-term ownership costs significantly?

Yes, the S-Class's 23 combined MPG is notably better than the M8's 17 combined MPG, meaning the S-Class owner will spend noticeably less over the life of the car, especially considering both require premium fuel.

Which sedan offers more usable space for luggage?

Despite being the performance-oriented choice, the BMW M8 technically offers more cargo capacity at 15.5 cubic feet compared to the S-Class's 12.8 cubic feet.

Are these cars very different in size, despite both being large sedans?

They are close, but the S-Class is longer at 209.5 inches versus the M8's 200.9 inches, while the M8 is fractionally wider at 76.5 inches compared to the S-Class’s 75.6 inches.