2026 Audi RS 3 vs 2026 Mercedes-Benz E-Class

$66,100 · Sedan

$63,900 · Sedan

Comparison Overview

Deciding between the pocket rocket performance of the 2026 Audi RS 3 and the sophisticated comfort of the 2026 Mercedes-Benz E-Class presents a classic performance versus practicality trade-off. The RS 3, while sporting a higher $66,100 MSRP, delivers serious excitement with its 394 hp engine, leaving the E-Class (starting at $63,900) trailing with 255 hp. However, the E-Class claws back ground in efficiency, achieving 28 MPG combined compared to the Audi's 23 MPG combined—a 5 MPG difference that adds up quickly. Furthermore, the E-Class is substantially larger, boasting a length of 194.9 inches against the Audi's 178.5 inches, which translates to a generous 12.7 cu ft of cargo space versus the RS 3's tight 8.3 cu ft. This comparison boils down to prioritizing nearly 140 horsepower versus superior everyday usability and better running costs.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Mercedes-Benz E-Class

The 2026 Mercedes-Benz E-Class wins for commuters due to its superior combined fuel economy of 28 MPG versus the RS 3's 23 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 Mercedes-Benz E-Class

The E-Class offers significantly more space, with 12.7 cu ft of cargo capacity compared to the RS 3's 8.3 cu ft.

🏎️ Best for Enthusiasts

2026 Audi RS 3

The 2026 Audi RS 3 is the clear choice for performance lovers, boasting 394 hp and 369 lb-ft of torque.

💰 Best Value

2026 Mercedes-Benz E-Class

Despite a slightly lower MSRP of $63,900, the E-Class offers better long-term value through significantly better fuel economy.

Choose the Audi RS 3 if...

You demand maximum acceleration, leveraging the RS 3's 394 hp output.
You prefer the grip and stability offered by the RS 3's standard All-Wheel Drive.
You prefer a more compact footprint for urban driving, as the RS 3 is only 178.5 inches long.

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

You regularly take long highway trips and prioritize fuel savings (33 MPG Highway).
You need usable back seat and cargo room, benefiting from the E-Class's 12.7 cu ft capacity.
You prefer the smoother operation of a traditional 9-speed automatic transmission over the RS 3's 7-speed automated manual.

Key Dimensions

Dimension	Audi RS 3	Mercedes-Benz E-Class
Length	178.5"	194.9"
Width	72.9"	74.0"
Height	54.8"	57.9"
Wheelbase	103.6"	116.6"

Features Comparison

Safety

Feature	Audi	Mercedes-Benz
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	—
Lane Keeping Assist System	✓	—
Rear Cross Traffic Alert	✓	—
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 Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
LED Headlights	✓	✓
Adaptive Headlights	✓	✓
Daytime Running Lights	✓	✓
Headlight Washers	✓	—
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Integrated Headrests	✓	—
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Driver Attention Alert	—	✓
Brake Drying	—	✓
Brake Preparation System	—	✓
Headlight Delay-Off	—	✓
Front Power Adjustable Headrests	—	✓

Engine

Feature	Audi	Mercedes-Benz
Base Engine Displacement	2.5 L	2.0 L
Number of Cylinders	inline 5	inline 4
Base Engine Type	gas	mild hybrid
Horsepower	394 hp	255 hp @ 5800 rpm
Torque	369 lb-ft	295 lb-ft @ 2000 rpm
Number of Valves	20	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
[object Object]	✓	—
[object Object]	✓	—
Hill Descent Control	✓	—

Fuel

Feature	Audi	Mercedes-Benz
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	20/29 MPG	25/33 MPG
EPA Fuel Economy (Combined)	23 MPG	28 MPG
EPA Driving Range (City/Highway)	290.0/420.5 mi.	435.0/574.2 mi.
Fuel Tank Capacity	14.5 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	✓	✓
Front View Camera	✓	✓
Side View Camera	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
Driver Assisted Parking Assist	✓	—
Wireless Charging Pad	✓	✓
Adaptive Cruise Control	✓	—
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Three Zone Climate Control	✓	—
Rear Ventilation Ducts	✓	✓
Interior Air Filtration	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Power Tilt and Telescopic Steering Wheel	—	✓
Cruise Control on Steering Wheel	—	✓
Automatic Parking Assist	—	✓
Cruise Control	—	✓
Overhead Console with Storage	—	✓
Dual Zone Climate Control	—	✓

In Car Entertainment

Feature	Audi	Mercedes-Benz
Infotainment Display	10.1 in	14.4 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Sonos	—
Stereo Power	680W	—
Speaker System	15	6
Surround Audio	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

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	✓	✓

Frontseats

Feature	Audi	Mercedes-Benz
Front Head Room	36.8 in.	37.3 in.
Front Leg Room	41.2 in.	41.5 in.
Front Shoulder Room	54.8 in.	57.8 in.
Seat Material: Premium Leather	✓	—
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	8-way	10-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	3
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	—	✓
Passenger Seat Thigh Extension	—	✓
Passenger Seat Memory Settings	—	3

Rearseats

Feature	Audi	Mercedes-Benz
Rear Head Room	36.6 in.	37.6 in.
Rear Leg Room	35.2 in.	36.2 in.
Rear Shoulder Room	53.0 in.	57.1 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	Painted Alloy
Wheel Diameter	19 in	—
Tire Type	Performance	—
Tire Size	✓	225/55R18
Wheel Size	—	18 x 8.0 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 RS 3 and 2026 Mercedes-Benz E-Class.

How big is the difference in size between the 2026 Audi RS 3 and the 2026 Mercedes-Benz E-Class?

The Mercedes-Benz E-Class is substantially larger, measuring 194.9 inches in length compared to the Audi RS 3's 178.5 inches. This nearly 16-inch difference directly impacts interior and cargo space.

Is the Audi RS 3 much thirstier than the Mercedes-Benz E-Class?

Yes, the Audi RS 3 consumes significantly more fuel, achieving only 23 MPG combined, whereas the E-Class reaches 28 MPG combined. Both require premium unleaded fuel, but the 5 MPG difference favors the E-Class for daily driving costs.

Which car offers better acceleration metrics?

The 2026 Audi RS 3 is the clear performance leader, delivering 394 hp and 369 lb-ft of torque. The 2026 Mercedes-Benz E-Class offers 255 hp and 295 lb-ft of torque, making the Audi much quicker.

If I frequently carry passengers or luggage, which sedan is better?

The E-Class is the better choice for practicality; it offers 12.7 cu ft of trunk space. The RS 3 is much tighter, restricted to just 8.3 cu ft of cargo capacity.

Does the drivetrain setup significantly separate these two vehicles?

Absolutely; the Audi RS 3 utilizes an All-Wheel Drive system paired with a 7-speed automated manual transmission for sporty engagement. Conversely, the E-Class is Rear Wheel Drive with a more conventional 9-speed shiftable automatic transmission optimized for smoother cruising.

Is the $2,200 price gap between the two MSRPs justified by the performance difference?

The Audi RS 3 commands a $66,100 MSRP compared to the E-Class's $63,900, which factors in the major power advantage of 139 extra horsepower. Whether this power warrants the higher entry price depends entirely on your driving priorities.