2025 BMW M8 Gran Coupe vs 2026 Audi A8

$140,000 · Sedan

$95,100 · Sedan

Comparison Overview

Choosing between brutal performance and refined luxury often hinges on how much you prioritize raw speed over long-term cost and comfort. The 2025 BMW M8 Gran Coupe starts at a steep $140,000, boasting a massive 617 hp, perfect for track enthusiasts who crave that extra edge. In contrast, the 2026 Audi A8 comes in significantly cheaper at $95,100, offering a more sensible 335 hp. This power difference translates directly to efficiency: the A8 achieves a combined 22 MPG, easily beating the M8's 17 MPG combined rating. Furthermore, the A8 is over 8 inches longer (209.5 inches vs. 200.9 inches) than the M8, potentially offering more interior space, though its cargo room is slightly smaller at 12.5 cu ft compared to the M8’s 15.5 cu ft. The $44,900 savings and superior fuel economy make the A8 a compelling daily driver.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Audi A8

The 2026 Audi A8 wins for commuting due to its superior 22 MPG combined fuel economy compared to the M8's 17 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 Audi A8

The Audi A8 is the better family choice because it provides a quieter, more comfortable ride philosophy with better fuel efficiency.

🏎️ Best for Enthusiasts

2025 BMW M8 Gran Coupe

The 2025 BMW M8 Gran Coupe is the enthusiast's pick, offering a staggering 617 hp and 553 lb-ft of torque.

💰 Best Value

2026 Audi A8

The Audi A8 delivers substantial savings, costing $44,900 less than the BMW M8 while still offering AWD performance.

Choose the BMW M8 Gran Coupe if...

You demand maximum straight-line speed, evidenced by the M8's 617 hp.
You need the slightly larger 15.5 cu ft of cargo space provided by the M8.
You prefer the more potent torque figure of 553 lb-ft for quick overtakes.

Choose the Audi A8 if...

Saving nearly $45,000 on the initial purchase price is a priority ($95,100 MSRP).
Fuel efficiency is key, as the A8 achieves 22 MPG combined versus 17 MPG for the M8.
You want the marginally larger overall footprint, measuring 209.5 inches in length.

Key Dimensions

Dimension	BMW M8 Gran Coupe	Audi A8
Length	200.9"	209.5"
Width	76.5"	76.6"
Height	55.9"	58.3"
Wheelbase	119.2"	123.1"

Features Comparison

Safety

Feature	BMW	Audi
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	✓	✓
Dual Rear Side-Mounted Airbags	—	✓
Cornering Lights	—	✓
Front Fog Lights	—	✓
Front Multi-Adjustable Headrests	—	✓
Rear Height Adjustable Headrests	—	✓

Engine

Feature	BMW	Audi
Base Engine Displacement	4.4 L	3.0 L
Number of Cylinders	V8	V6
Base Engine Type	gas	mild hybrid
Horsepower	617 hp @ 6000 rpm	335 hp
Torque	553 lb-ft @ 1800 rpm	369 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	Audi
Transmission Type	8-speed shiftable automatic	8-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
[object Object]	✓	—
[object Object]	✓	—
Center Differential Type	—	Limited Slip
Hill Descent Control	—	✓

Fuel

Feature	BMW	Audi
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	15/22 MPG	19/27 MPG
EPA Fuel Economy (Combined)	17 MPG	22 MPG
EPA Driving Range (City/Highway)	301.5/442.2 mi.	412.3/585.9 mi.
Fuel Tank Capacity	20.1 gal.	21.7 gal.

Comfort & Convenience

Feature	BMW	Audi
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	—	✓
Extended Cabin Heating	—	✓

In Car Entertainment

Feature	BMW	Audi
Infotainment Display	12.3 in	10.1 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Harman/Kardon	—
Stereo Power	464W	730W
Speaker System	16	17
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	3 months
Premium Brand Speakers	—	Bang & Olufsen
Android Auto (Wireless)	—	✓
Apple CarPlay (Wireless)	—	✓
Speed Sensitive Volume Control	—	✓

Power Feature

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

Frontseats

Feature	BMW	Audi
Front Head Room	40.6 in.	38.3 in.
Front Leg Room	42.1 in.	41.5 in.
Front Shoulder Room	57.2 in.	59.1 in.
Seat Material: Premium Leather	✓	—
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	12-way	18-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Thigh Extension	✓	—
Driver Seat Memory Settings	2	2
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	—	18-way
Passenger Seat Memory Settings	—	2

Rearseats

Feature	BMW	Audi
Rear Head Room	37.1 in.	38.5 in.
Rear Leg Room	36.6 in.	44.3 in.
Rear Shoulder Room	54.6 in.	57.6 in.
Split-Folding Rear Seatback	✓	✓
Folding Rear Seat Feature	✓	✓
Pass-Thru Center Armrest	✓	✓

Tires and Wheels

Feature	BMW	Audi
Wheel Finish	Painted Alloy	Painted Alloy
Wheel Size	20 x 10.5 in.	—
Tire Type	Performance	All Season
Tire Size	285/35R Y	265/40R20
Wheel Diameter	—	20 in.
Spare Tire Type	—	Temporary
Spare Tire Location	—	Inside Mounted

Suspension

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

Warranty

Feature	BMW	Audi
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.	12 yr./ unlimited mi.
Roadside Assistance	4 yr./ unlimited mi.	4 yr./ unlimited mi.
Complimentary Scheduled Maintenance	3 yr./ 36000 mi.	3 yr./ 30000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 BMW M8 Gran Coupe and 2026 Audi A8.

What is the biggest performance difference between the 2025 BMW M8 Gran Coupe and the 2026 Audi A8?

The key difference lies in raw output: the M8 boasts 617 hp and 553 lb-ft of torque, whereas the A8 produces a more modest 335 hp and 369 lb-ft of torque. This represents a substantial 282 hp gap favoring the BMW.

Is the fuel cost significantly higher for the BMW M8 compared to the Audi A8?

Yes, the M8 is significantly thirstier, achieving only 17 MPG combined, requiring premium fuel. The A8 provides better efficiency at 22 MPG combined, which will result in noticeable long-term savings given both require premium unleaded.

Which sedan offers more usable space for passengers and luggage?

The 2026 Audi A8 is physically longer at 209.5 inches, suggesting better passenger room, but the 2025 BMW M8 technically offers more cargo volume at 15.5 cu ft versus the A8's 12.5 cu ft.