VS
At a Glance
Power
354hp @ 5400
671hp @ 6750
Torque
369lb-ft @ 1370
752lb-ft
Fuel
26 mpg est.
20 mpg est.
Engine
3.0 L/183ci
2.0 L/121ci
Choosing between the Audi A4 and the Mercedes-Benz C-Class is one of the most common decisions car buyers in the United States face. The Audi A4 delivers 354hp @ 5400 while the Mercedes-Benz C-Class produces 671hp @ 6750. On fuel, the A4 returns 26 mpg est. while the C-Class uses 20 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $51,400 for the A4 and $49,650 for the C-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 A4S4 3.0 TFSI Premium Plus quattro AWD 2018 - From $51,400
Mercedes-Benz C-ClassAMG C 63 S E Performance Sedan 2026 - From $49,650
Performance
Power Output (hp)
354hp @ 5400
671hp @ 6750
Torque (lb-ft)
369lb-ft @ 1370
752lb-ft
Engine & Drivetrain
Engine Capacity
3.0 L/183ci
2.0 L/121ci
Engine Layout
V
—
Cylinders
6
4
Fuel Type
Gasoline
Plug-In Hybrid
Forced Induction Device
Turbocharged
—
Transmission
Automatic
Automatic
Number of Gears
8
—
Drive Wheels
All Wheel Drive
All Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
26 mpg est.
20 mpg est.
Fuel Economy - City (mpg)
21mpg
19 (2025)mpg
Fuel Economy - Highway (mpg)
30mpg
22 (2025)mpg
Fuel Tank Capacity (gal)
15.3gal
17.4gal
Dimensions
Length (in)
186.8in
190.6in
Width (in)
72.5in
77.4in
Height (in)
55.3in
57.4in
Wheelbase (in)
111.2in
113.1in
Curb Weight (lbs)
3858lbs
4817lbs
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
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
Mercedes-Benz C-Class
2 / 4 categories
Performance
C-Class
Fuel Economy
A4
Value
C-Class
Practicality
Tied
Pros & Cons
Audi A4
Better fuel economy (26 mpg est.)
Higher starting price
Mercedes-Benz C-Class
Lower starting price ($49,650)
Higher fuel consumption (20 mpg est.)
Frequently Asked Questions
Which is more fuel efficient, the A4 or C-Class?
The A4 gets 26 mpg est. and the C-Class gets 20 mpg est. on the combined cycle. The A4 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 A4 or C-Class?
The A4 produces 354hp @ 5400 and 369lb-ft @ 1370 of torque while the C-Class delivers 671hp @ 6750 and 752lb-ft of torque. The C-Class is the more powerful option.
What is the price difference between the A4 and C-Class?
The A4 starts from $51,400 and the C-Class from $49,650. The C-Class is cheaper by $1,750 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the A4 or the C-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