2026 Audi A8 vs 2026 Mercedes-Benz S-Class

$95,100 · Sedan

$119,500 · Sedan

Comparison Overview

The most significant numerical divergence between the 2026 Audi A8 and the 2026 Mercedes-Benz S-Class is the $24,400 MSRP differential, with the Audi starting at $95,100 versus the Mercedes at $119,500. This price gap translates directly to performance differences; the S-Class commands a substantial 107 horsepower advantage, boasting 442 hp compared to the A8's 335 hp, along with superior torque at 413 lb-ft versus 369 lb-ft. Fuel efficiency favors the S-Class slightly, achieving 23 combined MPG versus the A8's 22 combined MPG, translating to 29 highway MPG for the Mercedes against the Audi's 27 MPG. Dimensions are nearly identical, although the S-Class is marginally taller at 59.2 inches (A8: 58.3 inches) and offers slightly more cargo space at 12.8 cu ft compared to the A8's 12.5 cu ft. The difference in transmission calibration is also notable, with the S-Class utilizing a 9-speed automatic versus the A8's 8-speed unit.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Audi A8

The Audi A8 wins for commuters due to its $24,400 lower MSRP, offering a more accessible luxury entry point.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz S-Class

The Mercedes-Benz S-Class wins for families due to its marginally larger 12.8 cu ft cargo capacity and slightly better fuel economy across the board.

🏎️ Best for Enthusiasts

2026 Mercedes-Benz S-Class

The Mercedes-Benz S-Class is the clear enthusiast choice, delivering 442 hp and 413 lb-ft of torque, significantly outpacing the Audi's 335 hp.

💰 Best Value

2026 Audi A8

The Audi A8 provides superior value by delivering comparable dimensions and AWD capability at a $24,400 lower purchase price.

Choose the Audi A8 if...

Budget adherence is paramount, given the $24,400 lower starting MSRP.
All-wheel drive efficiency is prioritized over outright power, evidenced by its 22 combined MPG.
A preference for a slightly more compact structure exists, as it is marginally shorter in height (58.3 inches vs 59.2 inches).

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

Maximum straight-line performance is required, with 442 hp and 413 lb-ft of torque available.
The maximum number of gear ratios is preferred, as the S-Class features a 9-speed automatic transmission.
The highest measurable fuel economy figures are desired, posting 20/29 MPG city/highway.

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	✓	✓
Cornering Lights	✓	✓
Front Fog 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	—	✓
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	442 hp
Torque	369 lb-ft	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
Hill Descent Control	✓	—

Fuel

Feature	Audi	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	19/27 MPG	20/29 MPG
EPA Fuel Economy (Combined)	22 MPG	23 MPG
EPA Driving Range (City/Highway)	412.3/585.9 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	1st Row Power Glass Extended
Keyless Entry	✓	✓
Reverse Tilt Passenger Mirror	✓	✓
Heated Mirrors	✓	✓

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.
Split-Folding Rear Seatback	✓	—
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.
Complimentary Scheduled Maintenance	3 yr./ 30000 mi.	—
Hybrid Component Warranty	—	6 yr./ 62000 mi.

Frequently Asked Questions

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

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

The primary difference lies in power output. The Mercedes-Benz S-Class produces 442 horsepower and 413 lb-ft of torque, creating a substantial 107 hp advantage over the Audi A8's 335 hp rating.

How does the MSRP impact the overall value proposition of these two sedans?

The Audi A8 offers significantly better entry-level value, costing $95,100 compared to the S-Class's $119,500. This $24,400 difference means the A8 buyer trades a large portion of performance for substantial upfront savings.

Are there significant differences in exterior size between the two models?

No, the length is identical at 209.5 inches for both sedans. The S-Class is marginally taller by 0.9 inches (59.2 vs 58.3 inches) and narrower by 1.0 inch (75.6 vs 76.6 inches).

Which car offers better fuel economy for daily driving?

The Mercedes-Benz S-Class is marginally more efficient, achieving 23 combined MPG (20 city/29 highway) compared to the Audi A8's 22 combined MPG (19 city/27 highway).

Do both vehicles utilize the same drivetrain configuration?

Yes, both the 2026 Audi A8 and the 2026 Mercedes-Benz S-Class come standard with all-wheel drive capability. However, the S-Class employs a 9-speed automatic transmission, whereas the A8 uses an 8-speed unit.

Is there a measurable difference in usable storage space?

The differences are minor; the Mercedes-Benz S-Class has a slightly larger cargo capacity at 12.8 cu ft, marginally surpassing the Audi A8's 12.5 cu ft.