2021 Audi S4


Ranked #2 in Compact Sedan

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Starting MSRP 

$49,900 - $58,200

Key Spec of 2021 Audi S4
fuel economy


fuel type

premium unleaded


349 hp @ 5400 rpm

basic warranty

4 yr./ 50000 mi.

2021 Audi S4 Price, Review, Ratings and Pictures

Updated on: December 28, 2021

Nathan Dyer's image
Nathan Dyer 

Senior Editor

Luxury sport sedans have always been a hot topic of discussion in the automotive market. The familiar Audi S4 has been a genuine contender in this segment for many years, offering all the perks and traits of a fierce sports sedan. However, with rivals getting better with every model year, the S4 has fallen a bit down the pecking order. 

ProsConsWhat's New

Refined powertrain with a spirited acceleration

Steering feedback feels too light

Since its redesign only happened last year, the 2021 Audi S4 sees no major changes except a few additions to the technology suite and available packages

Cutting-edge tech suite representing German excellence at its best

The small trunk may not be practical for families

Wireless Apple CarPlay is added fresh this year

Quiet and composed ride quality combined with an elegant interior setup

he Convenience package gets a new heated steering wheel and Park Assist added to the equation

The Premium Plus trim now unlocks Audi's adaptive cruise control, lane keep assist, and a top view camera while the Prestige trim gets heated rear seats

Over All Rating


Out of 10

Pricing and Features8.00
Engine and Performance9.10
Fuel Economy7.20
Notable Rankings

#2 in Compact Sedan

#2 in Midsize Sedan

#7 in Sedan

Pictures & Videos


Premium$49,900 onwards

  • Apple CarPlay and Android Auto
  • Forward collision mitigation
  • Heated front sport seats
  • Lane departure warning
  • Leather and simulated suede upholstery

Premium Plus$53,500 onwards

  • Blind-Spot monitor
  • Digital instrument panel
  • Heated steering wheel
  • Keyless entry
  • Parking sensors
  • Rear cross-traffic alert
  • Surround-View camera system

Prestige$58,200 onwards

  • Bang & Olufsen audio system
  • Head-Up display
  • Heated rear seats
  • Navigation system

Colors and Styles

2021 Audi S4 in Tango Red Metallic color
Tango Red Metallic

Expert Review, Pricing Analysis and Buying Guide

The 2021 Audi S4 sedan has a lot of flair going for it, with a powerful V-6 powertrain, well-crafted interiors, and a class-leading tech suite inside. With all these positive aspects, will the Audi S4 be the top choice for performance enthusiasts? Let’s discover what amazing features we can get by opting for the 2021 Audi S4 Sedan.

2021 Audi S4 Sedan front angle view
2021 Audi S4 Sedan rear angle view


The 2021 trim lineup remains the same with 3 trims on offer- Premium, Premium Plus, and Prestige. As you move up the trim level, more technology features and driver assistance tech get added. Here is an overview of all the trims and features.



Premium Plus






Key Features

Matrix-design LED headlights

In addition to or replaces Premium trim features with:

In addition to or replaces Premium Plus trim features with:


MMI touch display with 10.1-inch center screen

Audi virtual cockpit with 12.3-inch LCD digital instrument cluster

Animation for headlights and taillights


Wireless Apple CarPlay

A top view camera system

Audi MMI Navigation plus with Audi connect PRIME & PLUS (six-month trial subscription)


Leather/Alcantara seats with diamond stitching

Audi phone box with wireless charger and signal booster

Park assist


Lane departure warning

Audi adaptive cruise control with Traffic Jam assist

19-speaker Bang & Olufsen sound system with 3D sound


Audi active lane assist

Head-up display

Which Trim should you buy?

We will definitely suggest the mid-range Premium Plus trim as usual, as it offers a range of impressive creature comforts and gizmo. Alternatively, you can also equip this trim with the Convenience package to get almost all the privileges of the top-draw trim.

Engine and Performance

Audi retains the same 3-liter turbocharged V-6 unit for the S4 that worked wonders for the previous models. Of course, who would dare to replace an energetic engine that zips around effortlessly in the city and also out on the tracks? This engine chugs out 349 hp and 369 lb-ft of torque. Power distribution to the wheels is smooth thanks to an 8-speed automatic gearbox, which can also be controlled using the paddle shifters on the steering wheel. Audi pairs this quick-shifting transmission to its homegrown Quattro all-wheel-drive technology. 

2021 Audi S4 Sedan engine bay

The 2021 Audi S4 Sedan’s juicy powertrain establishes it as a certified highway speedster, although the powertrain is equally capable of taking things slow on a cruise around the city. The S4 clocks a speed of 60 mph from standstill within 4.2 seconds and sees off the quarter-mile run in 12.8 seconds. With a limit of 155 mph on the speedometer, the S4 is one of Audi’s sportiest sedans.


2021 Audi S4 

2021 Mercedes-AMG C43 Sedan

2021 BMW M340i

2021 Genesis G70 3.3T







3.0-liter Turbo Premium V-6

3.0-liter Twin Turbo Premium V-6

3.0-liter Turbo Gas/Electric Inline-6

3.3 Liter Twin-Turbo Premium V6







8-speed automatic w/OD

9-speed automatic w/OD

8-speed automatic w/OD

8-speed automatic w/OD

Power (hp @ RPM

349 @ 6300

385@ 6100

382 @ 5000

365 @ 6000

Torque (lb-ft @ RPM)

369 @ 3200

384 @ 2500

369 @ 1600

376 @ 1300

0-60 MPH (seconds)





Quarter-Mile (seconds)





Top-Speed (MPH)





The BMW M340i makes every other competitor taste the dust in the performance sector. The BMW also dominates the speed charts, although the Audi isn’t far behind either. The S4 may lag behind its Autobahn rivals in terms of power, but the sedan outclasses the Mercedes-Benz AMG C43 with its quicker acceleration. The Genesis G70 is the slowest one here on papers but by a slight margin only.

How well does the 2021 Audi S4 Sedan handle?

The previous generations of the S4 weren’t particularly known for adrenaline-boosting handling. However, with the new generation, the S4 totally changes the game in the handling department. Audi’s Quattro all-wheel-drive helps the S4 crack the hardest of terrains. Yes, the S4 may not glide on butter like an Alfa Romeo Guilia or the BMW M340i, but the Audi S4 shows extreme confidence while speeding through tight corners. 

This newborn enthusiasm can be credited to the S4’s precise steering system, which in combination with a solid chassis offers an impeccable drive quality that will linger in your mind for a while. An optional adaptive damping suspension further solidifies this glorious feel of going through coarse asphalt at breathtaking speeds.

Braking Performance

The 2021 Audi S4 Sedan offers a strong braking performance in almost every situation. The braking response is very sharp, much to the extent of too much for city speeds. The braking response turns soft while grinding it out at high speeds, which is also a bit of a bummer. Still, the brakes hold good enough to maintain their composure at high speeds.

2021 Audi S4 Sedan brake rotor


2021 Audi S4 

2021 Mercedes-AMG C43 Sedan

2021 BMW M340i

2021 Genesis G70 3.3T

Brake Rotors: Front (inches)





Brake Rotors: Rear (inches)





Curb Weight (lbs)





60-0 (feet)





Most performance sedans in this segment have no official data available regarding their 60-0 braking distance. However, to draw some conclusion, the standard Audi A4 does a 60-0 braking distance of 105 feet, making it one of the better performers in terms of braking.

Fuel Economy

The Audi S4 can return a mileage of 20mpg in the city and 28mpg on the highway, with a combined MPG of 23. These figures are decent enough for a V-6 powered vehicle. With a fuel tank capacity of 15.3 gallons, the S4 can shell out a driving distance of 306 miles in the city and 428 miles on the interstate. On average, the S4 should be able to offer you around 351 miles of combined driving range. The S4 isn’t particularly a family-friendly sedan in terms of economy, but it is still more efficient than most performance-oriented sedans out there in the market. 


2021 Audi S4 

2021 Mercedes-AMG C43 Sedan

2021 BMW M340i

2021 Genesis G70 3.3T

MPG (City)





MPG (Highway)





MPG (Combined)





Fuel Capacity (Gallons)





Range (City/Highway/Combined, in Miles)




The Audi S4 offers more fuel economy than its Mercedes-AMG c43 but loses out to its Bavarian counterpart. The BMW M340i is the overall best choice with its fine balance of performance and fuel efficiency, offering the best mileage in this segment.


Audi’s cars have always featured drool-worthy interior designs with intricate little details that stand out when you catch a first glimpse of the cabin. The 2021 Audi S4 interior reflects on the same philosophy featuring an elegant yet simple cabin that looks appealing to the eyes. Driver functionality is also the key element here, owing to the sporty nature of the sedan. Standard interior bits include 12-way power-adjustable sport seats with a 4-way power-lumbar and heating and massage function, which is standard on all three trims. The seats are covered in leather or Alcantara upholstery, both of which add to the ambiance of the cabin. Standard mood lighting creates a cozy atmosphere for the passengers seated. 

2021 Audi S4 Sedan cockpit area

The Convenience package adds a heated steering wheel and memory functionality to the driver’s seat. Customers also get a variety of interior colors and stitching patterns, to upgrade their cabin as per their incline. The trunk behind can only store 12 cubes of space, which is pretty underwhelming for a family on a trip. Still, the trunk may fit in 3 large suitcases with ease, making it ideal for daily use. The rear seats can be folded in a 40/20/40 split at the click of a button to accommodate some of your monthly groceries, while 4 cupholders and center armrest storage provide further convenience.

2021 Audi S4 Sedan front seats


2021 Audi S4 

2021 Mercedes-AMG C43 Sedan

2021 BMW M340i

2021 Genesis G70 3.3T

Seating Capacity





Front Row (Headroom/Shoulder Room/Leg Room, in inches)





Rear Row (Headroom/Shoulder Room/Leg Room, in inches)





Trunk Capacity (cubic feet)





The Audi S4 offers exquisite levels of luxury with its roomy interior dimensions and opulent material quality. The S4 has the smallest trunk in its segment though, which puts it at a disadvantage compared to rivals.

The standout interior features onboard the Audi S4 sedan are:

  • Leather/Alcantara seating upholstery
  • 12-way power-adjustable sport seats with a 4-way power-lumbar and heating and massage function
  • Brushed Aluminum inlays
  • Available Driver's front seat memory

What’s there to keep you entertained?

Audi’s love affair with futuristic technology continues inside the 2021 Audi S4 Sedan. A sizable 10.1-inch touchscreen displays all the infotainment features in crisp graphics. Audi’s intuitive MMI technology provides haptic feedback to the driver’s touch responses. Voice control enables an even more natural way of communication between the driver and the interface. 

Almost all the modern infotainment features are also integrated into the touchscreen, including the likes of wireless Apple CarPlay, Android Auto, HD Radio, and Bluetooth. A 10-speaker sound system plays your music on the go, while a 19-speaker 3D sound system from Bang & Olufsen is also available to woo audiophiles. 

The optimal Audi Virtual cockpit plus brings impressive features like a high-resolution 12.3-inch screen, three display modes and relays your location in Google Earth or via a 3D map. Customers can also enjoy the privilege of the available Audi Connect services, which brings to the table navigation directions, an in-car Wi-Fi hotspot, and much more. Other technological enhancements like SiriusXM satellite radio, wireless charging, and two rear USB ports for charging complete a brilliant tech suite.

In a nutshell, the 2021 Audi S4 has a plethora of cutting-edge gizmo like:

  • 10.1-inch MMI touchscreen
  • Wireless Apple CarPlay
  • Android Auto
  • Bluetooth
  • 10-speaker sound
  • Audi Virtual cockpit plus with 12.3-inch digital instrument cluster
  • SiriusXM satellite radio
  • 2 USB ports
  • Optional 19-speaker 3D sound system from Bang & Olufsen

The 2021 Audi S4 Sedan exterior design is widely related to its A4 sibling, but the S4 possesses several visual differences like a unique Singleframe grille with subtle vents and numerous aluminum-look accents. For 2021, the S4 turns on the style with its updated 18-inch wheel design and a new front and rear fascia. In the rear, a combination of the diffuser with a quad-exit exhaust setup and an integrated trunk spoiler looks sporty as hell. The S4 also makes a style statement with its S-tuned quad exhausts, LED daytime running lights, and a colorful palette of 8 exterior colors. 

​  2021 Audi S4 Sedan 


2021 Audi S4 

2021 Mercedes-AMG C43 Sedan

2021 BMW M340i

2021 Genesis G70 3.3T

Curb Weight (lb)




Length (inches)





Width (inches)





Height (inches)





Ground Clearance (inches)




Wheelbase (inches)





The exterior dimensions of the S4 remain unchanged for 2021. The exterior dimensions are well on par with other sedans in the class. The S4’s low ground clearance combined with Quattro all-wheel-drive grant it more stability and grip.

The Audi S4 stands out amongst the crowd with its unique styling elements like:

  • Auto-dimming exterior mirrors
  • 18-inch 5-Y-spoke design wheels
  • Matrix-design LED headlights
  • Integrated trunk spoiler
  • LED daytime running lights

The 2021 Audi S4 pays equal emphasis on performance as well as the safety of its passengers. Thus, to fulfill that promise, the S4 includes a host of standard safety features like LED headlights with auto high beams, rain-sensing wipers, a rearview camera, lane departure warning, and forward collision detection with autonomous emergency braking. By opting for the higher trim levels, the driver unlocks new safety techs like 

  • Audi adaptive cruise control with traffic jam assist and turn assist
  • Blind-spot monitoring with rear cross-traffic alert
  • A heads-up display
  • Park assist
  • Vehicle exit warning

Audi also provides a unique top view camera system that relays a birds-eye view of your car’s surroundings. You can also add matrix LED headlights to the table that enhance both your vehicle’s style and safety quotient.


2021 Audi S4 Sedan vs 2021 Mercedes-AMG C43 Sedan

The battle between two of Germany’s greatest automakers has always stirred up a lot of heat, and this duel is no different. The Merc may have the upper hand with a more powerful engine, but the S4 sends out a stern reply with a 0-60 mph time just 0.1 seconds faster than the Merc. However, the Merc’s AMG credentials prove to be the decisive factor in the handling sector, as it is more adept than the Audi in scaling corners. Both the sedans are almost neck-to-neck in terms of practicality, although the Mercedes offers slightly more storage. The Merc feels more like a raw performance-oriented sedan rather than a sports cruiser like the Audi S4. The choice is yours.

2021 Mercedes-AMG C43 Sedan

2021 Audi S4 Sedan vs 2021 BMW M340i Sedan

Audi and BMW’s fierce rivalry continues with the Audi S4 and the BMW M340i. However, the BMW M340i has clear bragging rights over its rival in the power and speed charts, fuel economy, handling dynamics, and cargo space. Technology-wise, both the sedans are evenly matched. The BMW can get pricier as you opt for more features though, but we still believe it is still worth all the bucks.

2021 BMW M340i Sedan

2021 Audi S4 Sedan vs 2021 Genesis G70 Sedan

The Genesis G70 is a welcome change over its aggressive German rivals in this segment. It has a snug old-school sedan-like feeling to it, without trying to overdo its sportiness. The G70 is a powerful sedan in its own sense, but the Audi S4 is at an advantage with more power under its hood. The G70 offers similar levels of luxury as the S4. Audi’s tech suite is still one of the finest in its business, but the G70 offers more trunk room. In a nutshell, the Genesis G80 is a great out-of-the-box choice in its pricey segment, although the Audi S4 is an amazing sedan in its own sense.

2021 Genesis G70 Sedan


Final Verdict

The 2021 Audi S4 Sedan is an excellent driver’s vehicle that offers luxury and performance in a single package. Audi’s Quattro AWD system and the powerful V-6 make the sedan a treat to drive. The best part about this sedan is the convenience of taking it out on daily errands as well as fun weekday trips with your family. The S4 feels right at home with its cutting-edge technology and racetrack-oriented vibes and is definitely one of Audi’s finest creations.


vehicle bio
base price


body style

4dr Sedan

engine type

183 cu in

horse power

349 hp @ 5400 rpm


369 lb.-ft. @ 1370 rpm


8 speed Automatic


187.5 in


111 in


72.5 in

curb weight

3847 lbs


56.2 in

passenger volume

91 cu ft

cargo volume

12 cu ft

passenger capacity

5 Seats

fuel economy

21/24/28 mpg

highway range

459 mi

basic warranty

4 yr./ 50000 mi.

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