VS
At a Glance
Power
335hp @ 5000
621hp @ 5250
Torque
369lb-ft @ 1370
664lb-ft @ 2000
Fuel
23 mpg est.
16 mpg est.
Engine
3.0 L/183ci
6.0 L/365ci
Choosing between the Audi A8 and the Mercedes-Benz S-Class is one of the most common decisions car buyers in the United States face. The Audi A8 delivers 335hp @ 5000 while the Mercedes-Benz S-Class produces 621hp @ 5250. On fuel, the A8 returns 23 mpg est. while the S-Class uses 16 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $92,000 for the A8 and $119,550 for the S-Class. 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 A8L 55 TFSI quattro 2025 - From $92,000
Mercedes-Benz S-ClassMaybach S 680 4MATIC Sedan 2026 - From $119,550
Performance
Power Output (hp)
335hp @ 5000
621hp @ 5250
Torque (lb-ft)
369lb-ft @ 1370
664lb-ft @ 2000
Engine & Drivetrain
Engine Capacity
3.0 L/183ci
6.0 L/365ci
Engine Layout
V
—
Cylinders
6
12
Fuel Type
—
Gasoline
Forced Induction Device
Turbocharged
Turbocharged
Transmission
Automatic
Automatic w/OD
Number of Gears
8
—
Drive Wheels
All Wheel Drive
All Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
23 mpg est.
16 mpg est.
Fuel Economy - City (mpg)
20mpg
12mpg
Fuel Economy - Highway (mpg)
26mpg
20mpg
Fuel Tank Capacity (gal)
21.7gal
22.2gal
Dimensions
Length (in)
208.7in
215.3in
Width (in)
76.6in
75.6in
Height (in)
58.6in
59.4in
Wheelbase (in)
123.2in
133.7in
Curb Weight (lbs)
4773lbs
5346lbs
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
✓ 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 A8
2 / 4 categories
Performance
S-Class
Fuel Economy
A8
Value
A8
Practicality
Tied
Pros & Cons
Audi A8
Better fuel economy (23 mpg est.)
Lower starting price ($92,000)
Few notable weaknesses
Mercedes-Benz S-Class
Well-rounded specification
Higher fuel consumption (16 mpg est.)
Higher starting price
Frequently Asked Questions
Which is more fuel efficient, the A8 or S-Class?
The A8 gets 23 mpg est. and the S-Class gets 16 mpg est. on the combined cycle. The A8 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 A8 or S-Class?
The A8 produces 335hp @ 5000 and 369lb-ft @ 1370 of torque while the S-Class delivers 621hp @ 5250 and 664lb-ft @ 2000 of torque. The S-Class is the more powerful option.
What is the price difference between the A8 and S-Class?
The A8 starts from $92,000 and the S-Class from $119,550. The A8 is cheaper by $27,550 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the A8 or the S-Class?
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