VS
At a Glance
Power
444hp @ 5900
523hp @ 5500
Torque
442lb-ft @ 2700
553lb-ft @ 1800
Fuel
23 mpg est.
20 mpg est.
Engine
2.9 L/177ci
4.4 L/268ci
Choosing between the Audi S6 and the BMW 8 Series is one of the most common decisions car buyers in the United States face. The Audi S6 delivers 444hp @ 5900 while the BMW 8 Series produces 523hp @ 5500. On fuel, the S6 returns 23 mpg est. while the 8 Series uses 20 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $84,100 for the S6 and $94,500 for the 8 Series. Both vehicles have their merits. The right choice depends on your priorities: fuel economy, performance, towing ability, safety features or total cost of ownership. This comparison covers every specification available so you can make an informed decision.
Specification
Audi S62.9 TFSI Prestige 2025 - From $84,100
BMW 8 SeriesM850i xDrive Coupe 2026 - From $94,500
Performance
Power Output (hp)
444hp @ 5900
523hp @ 5500
Torque (lb-ft)
442lb-ft @ 2700
553lb-ft @ 1800
Engine & Drivetrain
Engine Capacity
2.9 L/177ci
4.4 L/268ci
Engine Layout
V
—
Cylinders
6
8
Fuel Type
—
Gasoline
Forced Induction Device
—
Turbocharged
Transmission
Automatic
Automatic
Number of Gears
8
8
Drive Wheels
All Wheel Drive
All Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
23 mpg est.
20 mpg est.
Fuel Economy - City (mpg)
19mpg
17mpg
Fuel Economy - Highway (mpg)
27mpg
24mpg
Fuel Tank Capacity (gal)
19.3gal
18gal
Dimensions
Length (in)
195in
191.2in
Width (in)
74.3in
74.9in
Height (in)
56.9in
53in
Wheelbase (in)
115.3in
111.1in
Curb Weight (lbs)
4519lbs
4478lbs
Safety
ABS
✓ Standard
✓ Standard
Brake Assist
✓ Standard
✓ Standard
Stability Control
✓ Standard
✓ Standard
Traction Control
✓ Standard
✓ Standard
Driver Airbag
✓ Standard
✓ Standard
Passenger Airbag
✓ Standard
✓ Standard
Side Airbags Front
✓ Standard
✓ Standard
Curtain Airbags
✓ Standard
✓ Standard
Features & Tech
Air Conditioning
✓ Standard
✓ Standard
Climate Control
✓ Standard
✓ Standard
Cruise Control
✓ Standard
✓ Standard
Adaptive Cruise Control
✓ Standard
✓ Standard
Bluetooth
✓ Standard
✓ Standard
Backup Camera
✓ Standard
✓ Standard
Rear Parking Aid
✓ Standard
✓ Standard
Sunroof
✓ Standard
—
Heated Seats
✓ Standard
✓ Standard
Power Seat Adjustment
✓ Standard
✓ Standard
Keyless Entry
✓ Standard
✓ Standard
Alloy Wheels
✓ Standard
✓ Standard
The Verdict
Which Wins?
Overall Winner
Audi S6
2 / 4 categories
Performance
8 Series
Fuel Economy
S6
Value
S6
Practicality
Tied
Pros & Cons
Audi S6
Better fuel economy (23 mpg est.)
Lower starting price ($84,100)
Few notable weaknesses
BMW 8 Series
Well-rounded specification
Higher fuel consumption (20 mpg est.)
Higher starting price
Frequently Asked Questions
Which is more fuel efficient, the S6 or 8 Series?
The S6 gets 23 mpg est. and the 8 Series gets 20 mpg est. on the combined cycle. The S6 is the more fuel-efficient choice. In real-world conditions with a mix of highway and urban driving, actual figures will be slightly higher.
Which has more power, the S6 or 8 Series?
The S6 produces 444hp @ 5900 and 442lb-ft @ 2700 of torque while the 8 Series delivers 523hp @ 5500 and 553lb-ft @ 1800 of torque. The 8 Series is the more powerful option.
What is the price difference between the S6 and 8 Series?
The S6 starts from $84,100 and the 8 Series from $94,500. The S6 is cheaper by $10,400 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the S6 or the 8 Series?
It depends on your priorities. If fuel economy matters most, check the mpg figures above. If you need towing capacity, compare the towing ratings. For day-to-day driving - commutes, school runs and highway trips - consider ground clearance, service network coverage, and total cost of ownership including insurance and maintenance. Use the spec tables above to compare every detail before making your decision.
Also Consider