2025 Audi A8 vs 2026 Mercedes-Benz S-Class

$92,000 · Sedan

$119,500 · Sedan

Comparison Overview

The 2025 Audi A8 bursts onto the scene prioritizing refined efficiency and immediate, accessible luxury with its 335 hp V6, making a compelling case for understated prestige starting at an MSRP of $92,000. Conversely, the 2026 Mercedes-Benz S-Class enters as the undisputed performance titan, unleashing a thrilling 442 hp and 413 lb-ft of torque, though this power demands an elevated $119,500 entry point. While both sedans share the same 209.5-inch length, the S-Class edges out marginally in efficiency with 23 combined MPG versus the A8's 22 combined MPG, utilizing a 9-speed automatic compared to the A8's 8-speed unit. This showdown pits the A8’s value proposition against the S-Class’s dominating 107 hp advantage, presenting luxury buyers with a clear delineation between accessible excellence and outright excess in the flagship sedan segment.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Audi A8

The Audi A8 offers a lower entry cost of $92,000, providing flagship comfort without the Mercedes' significant premium.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz S-Class

The Mercedes-Benz S-Class provides slightly more room with 12.8 cu ft of cargo capacity and potentially a marginally smoother ride due to its higher torque delivery.

🏎️ Best for Enthusiasts

2026 Mercedes-Benz S-Class

The S-Class boasts a substantial 442 hp and 413 lb-ft of torque, offering significantly superior straight-line performance over the A8's 335 hp.

💰 Best Value

2025 Audi A8

With a $27,500 lower MSRP, the A8 delivers a comprehensive luxury experience at a vastly more attainable price point.

Choose the Audi A8 if...

You require a sophisticated AWD luxury sedan for under $100,000 (MSRP $92,000).
Your primary focus is excellent luxury cruising rather than maximizing raw engine output.
You prefer the balanced efficiency provided by the A8's 335 hp engine configuration achieving 26 MPG highway.

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

You demand the absolute pinnacle of available power, exemplified by the S-Class's 442 hp.
You value marginally superior highway efficiency, scoring 29 MPG highway versus the A8's 26 MPG.
You desire the absolute latest technology signaled by the 9-speed automatic transmission and superior torque figures.

Key Dimensions

Dimension	Audi A8	Mercedes-Benz S-Class
Length	209.5"	209.5"
Width	76.6"	75.6"
Height	58.3"	59.2"
Wheelbase	123.1"	126.6"

Features Comparison

Safety

Feature	Audi	Mercedes-Benz
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 Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Self-Leveling Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Multi-Adjustable 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	—	✓
Front Cross Traffic Alert	—	✓
Rear Cross Traffic Alert	—	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Adaptive Headlights	—	✓
Cornering Lights	—	✓
Front Power Adjustable Headrests	—	✓
Rear Multi-Adjustable Headrests	—	✓

Engine

Feature	Audi	Mercedes-Benz
Base Engine Displacement	3.0 L	3.0 L
Number of Cylinders	V6	inline 6
Base Engine Type	mild hybrid	mild hybrid
Horsepower	335 hp @ 6000 rpm	442 hp
Torque	369 lb-ft @ 4500 rpm	413 lb-ft
Number of Valves	24	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	Audi	Mercedes-Benz
Transmission Type	8-speed shiftable automatic	9-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
Center Differential Type	Limited Slip	Limited Slip

Fuel

Feature	Audi	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	20/26 MPG	20/29 MPG
EPA Fuel Economy (Combined)	22 MPG	23 MPG
EPA Driving Range (City/Highway)	434.0/564.2 mi.	400.0/580.0 mi.
Fuel Tank Capacity	21.7 gal.	20.0 gal.

Comfort & Convenience

Feature	Audi	Mercedes-Benz
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Front View Camera	✓	✓
Side View Camera	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
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	✓	—
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Cruise Control on Steering Wheel	—	✓
Automatic Parking Assist	—	✓
Adaptive Cruise Control	—	✓
Overhead Console with Storage	—	✓
Wood Trim on Steering Wheel	—	✓
Dual Zone Climate Control	—	✓
Rear Ventilation Ducts	—	✓
Extended Cabin Heating/Cooling	—	✓
Sun Sensor	—	✓

In Car Entertainment

Feature	Audi	Mercedes-Benz
Infotainment Display	10.1 in	12.8 in
AM/FM Stereo	✓	✓
Premium Brand Speakers	Bang & Olufsen	—
Stereo Power	730W	710W
Speaker System	17	15
Surround Audio	Discrete	Discrete
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	6 months
Speed Sensitive Volume Control	✓	✓
Premium Speaker Brand	—	Burmester
Subwoofer Count	—	2
Auxiliary Audio Input	—	✓

Power Feature

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

Frontseats

Feature	Audi	Mercedes-Benz
Front Head Room	38.3 in.	42.1 in.
Front Leg Room	41.5 in.	41.4 in.
Front Shoulder Room	59.1 in.	59.6 in.
Seat Material: Leather	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	18-way	12-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	3
Passenger Seat Power Adjustments	18-way	12-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Passenger Seat Memory Settings	2	3
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Ventilation	✓	✓
Passenger Seat Ventilation	✓	✓
Driver Seat Thigh Extension	—	✓
Passenger Seat Thigh Extension	—	✓
Seat Massage Function	—	✓

Rearseats

Feature	Audi	Mercedes-Benz
Rear Head Room	38.5 in.	39.4 in.
Rear Leg Room	44.3 in.	43.8 in.
Rear Shoulder Room	57.6 in.	59.0 in.
Folding Rear Seat Feature	✓	—
Pass-Thru Center Armrest	✓	—
Folding Center Armrest	—	✓

Tires and Wheels

Feature	Audi	Mercedes-Benz
Wheel Finish	Painted Alloy	—
Wheel Diameter	20 in.	—
Tire Type	All Season	—
Tire Size	265/40R20	255/45R19
Spare Tire Type	Temporary	—
Spare Tire Location	Inside Mounted	—
Wheel Material	—	Alloy
Wheel Size	—	19 x 8.5 in
Run Flat Tires	—	✓

Suspension

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

Warranty

Feature	Audi	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.
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Audi A8 and 2026 Mercedes-Benz S-Class.

What is the primary performance difference between the 2025 Audi A8 and the 2026 S-Class?

The 2026 Mercedes-Benz S-Class is significantly more potent, generating 442 hp and 413 lb-ft of torque, which dwarfs the 2025 Audi A8’s output of 335 hp and 369 lb-ft. This 107 hp gap ensures the S-Class offers a markedly more vigorous driving experience.

Is the extra cost of the S-Class justified by practicality improvements over the A8?

Practically, the differences are minimal; both vehicles share an identical length of 209.5 inches, and the S-Class only offers 0.3 cu ft more cargo space (12.8 cu ft vs 12.5 cu ft). The $27,500 price difference primarily pays for significant horsepower and technological upgrades, not utility.

Both cars require premium fuel; how do their fuel economies compare?

The Mercedes S-Class edges out the Audi A8 slightly in overall efficiency, achieving 23 combined MPG compared to the A8's 22 combined MPG. On the highway, the S-Class delivers 29 MPG, beating the A8’s 26 MPG rating.

How do the transmissions affect the driving dynamics of these two luxury sedans?

The A8 utilizes an 8-speed shiftable automatic, offering smooth, well-tested shifts for its drivetrain. In contrast, the S-Class upgrades to a 9-speed shiftable automatic, which generally aids in maximizing the performance potential of its higher horsepower rating during acceleration.

If I am looking for the most affordable entry into this tier of AWD luxury, which car should I select?

The 2025 Audi A8 is the definitive choice for affordability in this comparison, retailing for an MSRP of $92,000. The S-Class demands a steep $119,500 entry, making the A8 the superior option for budget-conscious buyers seeking flagship AWD comfort.

Are the physical footprints of the A8 and S-Class vastly different?

No, their overall dimensions are quite similar; both measure 209.5 inches in length. The S-Class is slightly narrower at 75.6 inches versus the A8's 76.6 inches, but it is slightly taller at 59.2 inches compared to the A8's 58.3 inches.