It was in 2019 when Audi revealed the renewed Audi A4, but the company has now improved the compact-luxury sedan for the upcoming year year, the 2021 Audi A4 comes with a power boost and standard all-wheel drive. They have added a 12-volt Hybrid system which increases the power by 13hp in both the available powertrains, which mostly goes unnoticed by buyers.

The Audi A4 sedan is a well-known car in the automaker’s lineup and somehow the most neglected. To rival the lunatic coupe crossovers and all-electric vehicles, it takes more than just an exceptional value to stand out. After the looks were given a major overhaul in 2020, the 2021 Audi A4 adds a 12-volt mild-hybrid system to the powertrain and bit of more safety upgrades coupled with refreshed design to take on rivals like the BMW 3-series and the Mercedes-Benz C-Class.

What's new in the 2021 Audi A4?

The Audi A4 was heavily updated in 2020 and begins the 2021 model year with only subtle changes. You will now see a 13-hp boost in power for models outfitted with Audi's turbocharged 2.0-liter TSI motor which will be because of the 12-volt mild-hybrid system. The A4 A40 TFSI now puts out 201 horsepower while the A45 TSI puts out  261 hp. Audi has now ditched the FWD setup and all 2021 A4s have Quattro AWD as standard.

2021 Audi A4

Some of the other changes include a wireless Apple Carplay integration and the inclusion of some more safety tech. The Premium Plus trim as it now has adaptive cruise control with active lane assist, hands-on detection steering wheel, and a 360-degree camera system.


  • Standard AWD
  • Neat interior 
  • Compliant ride
  • Mild-Hybrid powertrain
  • Safety features


  • No manual transmission
  • Cramped trunk
  • Aging looks
  • 7-speed delays at low speeds

2021 Audi A4 Price

The Audi A4 sedan comes in three trim levels, Premium, Premium Plus, and Prestige. The A4 is offered in two flavors A40(201hp) and A45(261hp) and all-wheel drive is standard. The A45 powertrain with 60 horsepower more is a gorgeous selection over the base motor and it cost only $1300 extra. The 2021 Audi A4 starts around $39,100 and goes up to $49,800 for the top trim. The Audi A4 Allroad will cost you up to $45,000.

Engine and Performance

The base model gives enough excitement as the engineers from Ingolstadt have stroked the turbocharged 2.0-liter motor to juice some extra horsepower. The entry-level A4 A40 now offers 201 horsepower on the tap which was 186 on the previous variant. All of the powertrains in A4 are upgraded with a 12-volt mild-hybrid setup, which also runs the starter motor for improved engine startup and perhaps raising the fuel-saving.

Audi A4 Powertrain with mild-hybrid tech

It's different from the 48-volt mild-hybrid system that has the potential to operate suspension elements and electronic turbochargers. Now, the A40 also gets standard Quattro all-wheel drive and ditched the FWD setup for good. 2021 A4 45 is able to dish out 261 hp for those enthusiasts who want a bit more power on their daily commute. Both of the engines come mated to a 7-speed automatic transmission which provides slick shifts and is faster than the previous iteration.


Audi A4 Prestige 45 TFSI

Mercedes-Benz C300

Lexus IS 350

BMW 330i xDrive







2.0L Turbocharged inline-4

2.0L Turbocharged inline-4

3.5L V6

2.0L Turbocharged inline-4


7-Speed S-Tronic Dual Clutch Automatic

9G-Tronic 9-Speed Automatic

8-Speed Sport Direct-Shift Automatic

8-Speed Sport Automatic






Power output(hp)

248 @ 5000 rpm

255 @ 5800 rpm

311 @ 6600 rpm

255 @ 5000 rpm


273 @ 1600 rpm

273 @ 1800 rpm

277 @ 4800 rpm

295 @ 1550 rpm

People with deeper pockets can opt for the more performance-oriented Audi S4 which antes up the game with a steamy 3.0 liter V6 powertrain dishing out 349 hp and mated to an 8-speed automatic transmission. The Audi A4 Allroad also uses a similar powertrain and transmission setup, just with a raised height for better drivability on the dusty tarmac.

The 12-volt mild-hybrid setup runs the starter motor for improved engine startup 

The base Audi A4 TFSI can scout to 60 mpg from standstill in seven seconds while the A4 45 takes just 5.5 seconds to reach the 60 mph mark. The seven-speed automatic transmission feels lousy at slower speeds but not much of a deal-breaker. The 2021 Audi A4 feels quiet, responsive, and agile even at a higher speed.


Audi A4 Prestige 45 TFSI

Mercedes-Benz C300

Lexus IS 350

BMW 330i xDrive

0-60 MPH

5.1 sec

5.9 sec

5.6 sec

5.3 sec

Quarter mile

13.8 sec

14.1 sec

14.0 sec

13.7 sec


2.0L Turbocharged inline-4

2.0L Turbocharged inline-4

3.5L V6

2.0L Turbocharged inline-4

Emissions(Tons/yr of CO2 at 15k mi/yr)





Its four-wheel independent suspension does a great job in absorbing bumps and does not hamper the ride by any means. There is optional sport suspension for this Audi which drops the ride height by nearly an inch, and firms up the ride for more solid handling. Steering character is significant in a sedan with sporting connotations.

The 2021 A4's steering is deft at lower speeds and on the highway. Though, the steering converts to being active when you drive the car on twisty roads. The A4 Allroad has an extra 1.3 inches of ground clearance over the sedan, which permits it to take slushy or wintry roads with confidence.

Fuel Economy

The rise in power figures for the 2021 Audi A4 and standard all-wheel-drive shouldn’t reduce the EPA numbers by a large difference. The Audi A4 40 TFSi should be able to 33 mpg on the highway, 25 mpg in the city, and 29 mpg combined which is quiet since it's not every day that you get to see new cars that perform better and are more frugal than their predecessors.


Audi A4 Prestige 45 TFSI

Mercedes-Benz C300

Lexus IS 350

BMW 330i xDrive
















Fuel Capacity(gal.)










The 2021 Audi A4 45, with 261 hp, will be rated at 24 mpg city/32 mpg hwy/27 mpg combined as the previous model generated a similar amount of horsepower. Both the powertrains have an automatic stop-start system that conserves fuel at traffic lights.

2021 Audi A4 Redesign

The Audi A4 sedan saw a complete overhaul in the year 2019, not much has changed for 2019 and only the hardware sees some revisions. You will see some mild refresh in front and rear styling which are mostly down to the slightly revised bumper design of the 2021 Audi A4.


This sedan was always about more tech inclusive as it can get Audi A4 in 2021 is carved with perfection. With a 10.1 touchscreen in the cabin, extra safety measures, more extensive space, and a classic yet sporty interior. The user interface is updated and is more intuitive, with premium quality crafted from top to bottom, it gives an experience of a lifetime.

2021 Audi A4 Interior

The full sunroof adds to the visual appeal from the inside, with broader space inside the ride in the car is all set to give a luxury touch to this sedan. The interior is built in consideration of the comfort of the users, which makes it a complete package. It emits a plush, sensible, and opulent vibe, and is an ideal balance of aesthetics and practicality. 


Audi A4 Prestige 45 TFSI

Mercedes-Benz C300

Lexus IS 350

BMW 330i xDrive

Passenger Capacity





Front Room(Head/Shoulder/ Leg)(in.)





Rear Room(Head /Shoulder/Leg)(in.)





The spacious interior has plush leather seats with comfortable bolstering and support for long journeys. Most of the surfaces are soft to the touch, however, a few hard plastic parts still manage to sneak in. The steering wheel is highly versatile and the driving position is extremely adaptive as well with a wide range of tilt and telescopic variations, and the dashboard has the ideal height for the driver to see the instrumentation clearly, without much eye-movement. But there's no denying that BMW and Mercedes interiors are a class apart and feel more luxurious.


Audi has re-imagined the New A4 2021 series, only making it sharper and premium. This four-ringed beauty just got a makeover and now is getting released with a larger front grille, premium plus trims, matrix LED, and Signature daytime running lights, which runs a perfect blend with the design dynamics of the car. The Front grill takes its inspirations from the Current Crop of Audis while the Matrix LED Headlamps complement the design.

2021 Audi A4 LED Headlights

The rear of the car is a tasteful re-design well executed with LED taillights, a new bumper and sharp edges completing the car with grace and style. The premium sedan rests on 18-inch wheels, a part of the upward models in the Premium trim. The A4’s simple shape hasn’t changed in a while, yet some of the features were revised last year. It’s understated amongst opponents but perfected in high-quality elements.


Audi A4 Prestige 45 TFSI

Mercedes-Benz C300

Lexus IS 350

BMW 330i xDrive

Curb Weight(lbs.)




















Ground Clearance(in.)










Track Width(in.) F/R





Available in 8 different colors including Brilliant black, ibis white in the no-cost options, and six other metallic hues like Florett Silver, Glacier White, Manhattan Gray, or Terra Grey and Mythos Black which is a more bling version of brilliant black. All the color choices present the car as glorious as it can get on the exterior.

2021 Audi A4 Safety Features

Audi A4 is one of the most selling sedans in the section. Audi has included in the use of high tensile steel and aluminum chassis which adds toughness while maintaining the weight low.  According to the results of the 2020 model, the National Highway Traffic Safety Administration has awarded the Audi A4 a 5-Star Overall Safety Rating. While Insurance Institute for Highway Safety has provided the A4 with a  “Top Safety Pick” label to the Audi A4. Some of the notable features are: 

  • Electronic Stability Control (ESC)
  • ABS And Driveline Traction Control
  • Side Impact Beams
  • Dual Stage Driver And Passenger Seat-Mounted Side Airbags
  • Audi pre sense basic
  • Low Tire Pressure Warning
  • Dual Stage Driver And Passenger Front Airbags
  • SIDE GUARD Curtain 1st And 2nd Row Airbags
  • Airbag Occupancy Sensor
  • Driver And Passenger Knee Airbag

Final Verdict

The 2021 Audi A4 as a luxury sports sedan, is obvious to love and difficult to blame: It's generously styled, well-built, and stuffed with tech jargon. As if that's not sufficient, it feels like a sport sedan and presents a harmonious ride.

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Where is the 2021 Audi A4 manufactured?

The A4 and the A4 Allroad get to the U.S. from Audi’s factory in Ingolstadt, Germany.

What is the sportier version of the 2021 Audi A4?

 It’s called the Audi S4, and it’s powered by a turbocharged 3.0-liter V6 with 349 hp. 

Is the 2021 Audi A4 a reliable car?

The 2021 Audi A4 has comparable reliability ratings as any other German luxury sedan.