2025 Audi S6 vs 2026 BMW 4 Series Gran Coupe

$75,900 · Sedan

$50,600 · Sedan

Comparison Overview

The most significant numerical gap between the 2025 Audi S6 and the 2026 BMW 4 Series Gran Coupe lies in their starting Manufacturer's Suggested Retail Price (MSRP), with the Audi commanding a $25,300 premium at $75,900 compared to the BMW's $50,600. This pricing disparity reflects a massive 189 horsepower advantage for the S6 (444 hp vs. 255 hp), resulting in superior straight-line performance metrics. Conversely, the BMW excels in operational efficiency, offering a superior combined fuel economy of 30 MPG versus the S6's 22 MPG. While the S6 offers standard all-wheel drive, the smaller BMW provides greater utility with 16.6 cu ft of cargo space compared to the Audi's 13.7 cu ft. The dimensions are relatively close, with the Audi being 6.5 inches longer, yet the fundamental division is performance versus financial prudence.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 BMW 4 Series Gran Coupe

The 2026 BMW 4 Series Gran Coupe wins for commuters due to its significantly higher fuel economy, achieving 30 MPG combined versus the Audi S6's 22 MPG combined.

👨‍👩‍👧‍👦 Best for Families

2026 BMW 4 Series Gran Coupe

The BMW 4 Series Gran Coupe is favored for families as it offers 16.6 cubic feet of cargo capacity, surpassing the Audi S6's 13.7 cubic feet.

🏎️ Best for Enthusiasts

2025 Audi S6

The 2025 Audi S6 is the definitive choice for performance enthusiasts, producing 444 horsepower and 442 lb-ft of torque, substantially outclassing the BMW's 255 hp and 295 lb-ft.

💰 Best Value

2026 BMW 4 Series Gran Coupe

The 2026 BMW 4 Series Gran Coupe delivers superior value by offering strong efficiency and acceptable performance for $25,300 less than the Audi S6.

Choose the Audi S6 if...

A driver requires the peak output of 444 horsepower and 442 lb-ft of torque for maximum acceleration potential.
All-wheel drive traction is a mandatory requirement regardless of the higher initial cost.
The owner prioritizes luxury sedan dimensions, as the S6 measures 195.0 inches in length.

Choose the BMW 4 Series Gran Coupe if...

Reducing fuel expenditure is critical, as the 4 Series achieves 30 MPG combined versus the S6's 22 MPG.
The budget is constrained, given the substantial $25,300 lower MSRP of $50,600.
Greater utility is needed, evidenced by the BMW's superior 16.6 cu ft cargo capacity over the Audi's 13.7 cu ft.

Key Dimensions

Dimension	Audi S6	BMW 4 Series Gran Coupe
Length	195.0"	188.5"
Width	74.3"	72.9"
Height	56.9"	56.8"
Wheelbase	115.3"	112.4"

Features Comparison

Safety

Feature	Audi	BMW
Lane Departure Warning	✓	✓
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	✓	✓
Daytime Running Lights	✓	✓
Headlight Washers	✓	—
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Integrated Headrests	✓	—
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Blind Spot Monitor	—	✓
Lane Keeping Assist System	—	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Brake Preparation System	—	✓
Self-Leveling Headlights	—	✓
Front Multi-Adjustable Headrests	—	✓

Engine

Feature	Audi	BMW
Base Engine Displacement	2.9 L	2.0 L
Number of Cylinders	V6	inline 4
Base Engine Type	mild hybrid	mild hybrid
Horsepower	444 hp	255 hp @ 4700 rpm
Torque	442 lb-ft	295 lb-ft @ 1600 rpm
Number of Valves	24	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	Audi	BMW
Transmission Type	8-speed shiftable automatic	8-speed shiftable automatic
Drivetrain Type	all wheel drive	rear wheel drive
Center Differential Type	Limited Slip	—

Fuel

Feature	Audi	BMW
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	19/27 MPG	27/35 MPG
EPA Fuel Economy (Combined)	22 MPG	30 MPG
EPA Driving Range (City/Highway)	366.7/521.1 mi.	421.2/546.0 mi.
Fuel Tank Capacity	19.3 gal.	15.6 gal.

Comfort & Convenience

Feature	Audi	BMW
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	—
Transmission Controls on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear and Side View Camera	✓	—
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
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	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Tilt and Telescopic Steering Wheel	—	✓
Cruise Control on Steering Wheel	—	✓
Rear View Camera	—	✓
Wireless Charging Pad	—	✓
Dual Zone Climate Control	—	✓
Rear Ventilation Ducts	—	✓

In Car Entertainment

Feature	Audi	BMW
Infotainment Display	10.1 in	14.9 in
AM/FM Stereo	✓	✓
Stereo Power	180W	205W
Speaker System	10	10
Android Auto (Wireless)	✓	—
Apple CarPlay (Wireless)	✓	—
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	12 months
Android Auto (Wired)	—	✓
Apple CarPlay (Wired)	—	✓

Power Feature

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

Frontseats

Feature	Audi	BMW
Front Head Room	38.0 in.	38.6 in.
Front Leg Room	41.3 in.	41.5 in.
Front Shoulder Room	57.8 in.	55.2 in.
Seat Material: Leather	✓	—
Front Seat Type: Sport	✓	✓
Driver Seat Power Adjustments	8-way	—
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	—
Driver Seat Thigh Extension	✓	✓
Driver Seat Memory Settings	2	2
Passenger Seat Power Adjustments	8-way	—
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	—
Passenger Seat Thigh Extension	✓	✓
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Seat Material: Leatherette	—	✓
Driver Seat Manual Adjustments	—	2-way
Passenger Seat Manual Adjustments	—	2-way

Rearseats

Feature	Audi	BMW
Rear Head Room	38.1 in.	36.6 in.
Rear Leg Room	37.4 in.	34.9 in.
Rear Shoulder Room	56.5 in.	54.3 in.
Split-Folding Rear Seatback	✓	✓
Folding Rear Seat Feature	✓	✓
Pass-Thru Center Armrest	✓	✓

Tires and Wheels

Feature	Audi	BMW
Wheel Material	Alloy	—
Wheel Size	21 in	18 x 8.5 in
Tire Type	Performance	—
Tire Size	255/35R21	245/45R H
Spare Tire Type	Temporary	—
Spare Tire Location	Inside Mounted	—
Wheel Finish	—	Painted Alloy
Run Flat Tires	—	✓

Suspension

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

Warranty

Feature	Audi	BMW
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.

Frequently Asked Questions

Common questions about comparing the 2025 Audi S6 and 2026 BMW 4 Series Gran Coupe.

What is the difference in driving dynamics between the standard RWD BMW and the AWD Audi?

The 2026 BMW 4 Series Gran Coupe features standard Rear Wheel Drive (RWD), prioritizing a traditional sport feel, while the 2025 Audi S6 comes standard with All-Wheel Drive (AWD), prioritizing enhanced traction in varied conditions. This AWD system aids the S6 in harnessing its higher power output effectively.

How much more fuel will I spend annually with the Audi S6 over the BMW 4 Series Gran Coupe?

The efficiency difference is 8 MPG combined (22 MPG vs. 30 MPG). This means the S6 owner will visit the premium unleaded pump significantly more often over a typical 15,000-mile annual cycle.

Is the $25,300 price difference fully justified by the power increase in the Audi S6?

The Audi S6 offers 189 more horsepower, but whether this justifies the $25,300 premium depends on usage; the BMW provides 255 hp for $50,600, which is adequate for most driving scenarios.

Do both models require the same grade of fuel?

Yes, both the 2025 Audi S6 and the 2026 BMW 4 Series Gran Coupe explicitly require premium unleaded fuel for optimal operation and performance.

Which vehicle offers a more practical shape for loading luggage?

The 2026 BMW 4 Series Gran Coupe offers a more practical shape and greater volume, providing 16.6 cubic feet of cargo capacity compared to the Audi S6's smaller 13.7 cubic feet.

How do the overall sizes compare for city maneuvering?

The BMW 4 Series Gran Coupe is notably more compact, measuring 188.5 inches long compared to the Audi S6's 195.0 inches, which could slightly benefit maneuverability in tight urban environments.