2025 Audi A4 vs 2026 Mercedes-Benz C-Class

$44,100 · Sedan

$49,650 · Sedan

Comparison Overview

Choosing between the updated 2025 Audi A4 and the forthcoming 2026 Mercedes-Benz C-Class often comes down to prioritizing immediate cost savings versus incremental efficiency gains. The A4 strikes a compelling financial pose with an MSRP of $44,100, undercutting the C-Class by a significant $5,550. Performance parity is high, with the Audi boasting 261 hp versus the Benz’s 255 hp, though the Mercedes leads in torque with 295 lb-ft against the Audi's 273 lb-ft. For daily drivers, the A4 manages 26 combined MPG while the C-Class edges it out at 29 combined MPG. Furthermore, the Audi is slightly more compact in length at 187.5 inches compared to the Benz’s 187.0 inches, yet surprisingly, the Audi offers marginally more storage at 12 cubic feet versus the C-Class's 11.6 cubic feet. Ultimately, the decision hinges on whether you value lower entry cost or slightly better fuel economy.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz C-Class

The 2026 Mercedes-Benz C-Class wins for commuters due to its superior combined fuel economy rating of 29 MPG.

👨‍👩‍👧‍👦 Best for Families

2025 Audi A4

The 2025 Audi A4 provides a slight advantage for families with its marginally larger 12 cubic feet of cargo space.

🏎️ Best for Enthusiasts

2025 Audi A4

Enthusiasts might prefer the A4’s slightly higher horsepower output of 261 hp versus the C-Class's 255 hp.

💰 Best Value

2025 Audi A4

The Audi A4 is the clear value winner, boasting an MSRP that is $5,550 lower than the Mercedes-Benz C-Class.

Choose the Audi A4 if...

You prioritize upfront savings, as the $44,100 MSRP is $5,550 less than the competition.
You prefer the slightly higher base horsepower figure of 261 hp.
You need the absolute maximum storage available, as the A4 offers 12 cu ft of cargo space.

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

Fuel efficiency is paramount, thanks to the C-Class’s 29 combined MPG rating.
You value greater pulling power, as the C-Class delivers 295 lb-ft of torque.
You prefer a rear-wheel-drive platform paired with a smoother-shifting 9-speed automatic transmission.

Key Dimensions

Dimension	Audi A4	Mercedes-Benz C-Class
Length	187.5"	187.0"
Width	72.7"	74.4"
Height	56.2"	56.6"
Wheelbase	111.0"	112.8"

Features Comparison

Safety

Feature	Audi	Mercedes-Benz
Lane Departure Warning	✓	—
Lane Keeping Assist System	✓	—
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front 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	✓	✓
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	✓	✓
Engine Immobilizer	✓	✓
Blind Spot Monitor	—	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Front Power Adjustable Headrests	—	✓
Anti-Theft Alarm System (Remote)	—	✓

Engine

Feature	Audi	Mercedes-Benz
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	mild hybrid	mild hybrid
Horsepower	261 hp @ 6300 rpm	255 hp @ 5800 rpm
Torque	273 lb-ft @ 4200 rpm	295 lb-ft @ 2000 rpm
Number of Valves	16	16
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	7-speed automated manual	9-speed shiftable automatic
Drivetrain Type	all wheel drive	rear wheel drive
Center Differential Type	Limited Slip	—

Fuel

Feature	Audi	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	23/32 MPG	25/35 MPG
EPA Fuel Economy (Combined)	26 MPG	29 MPG
EPA Driving Range (City/Highway)	351.9/489.6 mi.	435.0/609.0 mi.
Fuel Tank Capacity	15.3 gal.	17.4 gal.

Comfort & Convenience

Feature	Audi	Mercedes-Benz
Push Button Start	✓	✓
Tilt and Telescopic Steering Wheel	✓	—
Transmission Controls on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
Adaptive Cruise Control	✓	—
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Heated Steering Wheel	✓	—
Three Zone Climate Control	✓	—
Rear Ventilation Ducts with Fan Control	✓	—
Interior Air Filtration	✓	✓
Sun Sensor	✓	—
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Cargo Floor Mats	✓	—
Power Tilt and Telescopic Steering Wheel	—	✓
Cruise Control on Steering Wheel	—	✓
Automatic Parking Assist	—	✓
Wireless Charging Pad	—	✓
Cruise Control	—	✓
Dual Zone Climate Control	—	✓
Rear Ventilation Ducts	—	✓

In Car Entertainment

Feature	Audi	Mercedes-Benz
Infotainment Display	10.1 in	11.9 in
AM/FM Stereo	✓	✓
Stereo Power	180W	—
Speaker System	10	5
Subwoofer Count	1	1
Android Auto (Wired)	✓	—
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
Auxiliary Audio Input	✓	—
USB Port with External Media Control	✓	✓
Memory Card Slot	✓	—
Android Auto (Wireless)	—	✓
Satellite Radio	—	✓
Satellite Radio Trial Period	—	6 months

Power Feature

Feature	Audi	Mercedes-Benz
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass	1st Row Power Glass
Remote Keyless Entry	✓	—
Heated Mirrors	✓	✓
Keyless Entry	—	✓

Frontseats

Feature	Audi	Mercedes-Benz
Front Head Room	37.3 in.	40.0 in.
Front Leg Room	41.3 in.	41.7 in.
Front Shoulder Room	55.9 in.	56.3 in.
Seat Material: Leather	✓	—
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	8-way	10-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Passenger Seat Power Adjustments	8-way	10-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Seat Material: Leatherette	—	✓
Front Seat Type: Bucket	—	✓
Driver Seat Thigh Extension	—	✓
Driver Seat Memory Settings	—	3
Passenger Seat Memory Settings	—	3

Rearseats

Feature	Audi	Mercedes-Benz
Rear Head Room	37.4 in.	37.5 in.
Rear Leg Room	35.7 in.	36.0 in.
Rear Shoulder Room	54.5 in.	55.6 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	18 in	—
Tire Type	All Season	—
Tire Size	245/40R H	245/40R18
Spare Tire Type	Temporary	—
Spare Tire Location	Inside Mounted	—
Wheel Material	—	Alloy
Wheel Size	—	18 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 A4 and 2026 Mercedes-Benz C-Class.

Is the difference in fuel economy significant enough to justify the higher price of the Mercedes?

The 2026 C-Class achieves 29 combined MPG compared to the A4’s 26 combined MPG, saving roughly 3 MPG. Whether this savings offsets the $5,550 MSRP difference depends entirely on your annual mileage and how long you plan to own the vehicle.

Which car is actually bigger inside, despite the similar dimensions?

Based purely on the provided numbers, the 2025 Audi A4 is technically the larger carrier with 12 cubic feet of cargo capacity, edging out the C-Class's 11.6 cubic feet. However, the C-Class is slightly wider at 74.4 inches, which might translate to different passenger elbow room.

Does the Audi A4 require premium fuel, and how does that affect the running costs?

Yes, both the 2025 Audi A4 and the 2026 Mercedes-Benz C-Class mandate premium unleaded fuel. Since the C-Class has better MPG, the required premium fuel will cost less over time in the Mercedes compared to the Audi.

How do the transmissions compare between these two luxury sedans?

The Audi A4 utilizes a 7-speed automated manual transmission, whereas the Mercedes-Benz C-Class employs a 9-speed shiftable automatic. The C-Class’s extra two gears might lead to smoother highway cruising and potentially better optimization of its superior torque.

For drivers who need grip in snow, which model is better equipped?

The 2025 Audi A4 comes standard with an all-wheel-drive system, making it inherently better equipped for low-traction scenarios than the standard rear-wheel-drive configuration of the 2026 Mercedes-Benz C-Class.

Is the 6 lb-ft torque deficit in the Audi noticeable compared to the Mercedes?

While the C-Class leads with 295 lb-ft of torque versus the A4's 273 lb-ft, the A4 counters with a slight horsepower advantage at 261 hp versus 255 hp. In everyday driving, these small differences might be negligible unless you are focused purely on low-end acceleration sprints.