Overview & Reviews

With its line of S models, Audi has built a reputation for delivering understated luxury along with a healthy dose of performance. Supporting the foundation of this reputation is the Audi S4, which is a sportier variant of the already-proficient A4 entry-level luxury sedan. As such, both of these Audis benefit from handsome styling, excellent interior design and materials, cosseting comfort and superior road-holding thanks to all-wheel-drive traction.

Where the S4 and A4 differ is in performance. Throughout its run, the S4 has boasted higher power output, sharper handling and impressive braking capabilities. Shoppers seeking a used S4 may, depending on the model year, have several body styles from which to choose. On the downside, the S4 has typically lacked the crisp handling performance offered by some of its rivals. Overall, though, we hold the Audi S4 in high regard.

Current Audi S4
Unlike previous generations, the current fifth-generation Audi S4 is only available as a sedan. The convertible version has been replaced by the S5 Cabriolet. The S4 is powered by a supercharged 3.0-liter V6 that produces 333 horsepower and 325 pound-feet of torque. A standard six-speed manual or optional seven-speed dual-clutch automated manual (S tronic) sends power to Audi's rear-biased "Quattro" all-wheel-drive system.

Inside, you'll find (in true Audi tradition) one of the finest cabins in the sport sedan class. The overall design is demure but classy, and although the center console is rather button-happy, Audi's updated MMI electronics interface is now much friendlier to use than before. The seats are supremely comfortable in the front, offering plenty of support through corners and over distances. Like the A4, the S4 offers a reasonably large backseat should your sport sedan be called on for family duty.

The S4 comes with an ample list of standard luxury features like xenon headlights, selectable driving settings (known as Audi Drive Select), tri-zone climate control and leather/faux-suede upholstery. Upgrades include bigger wheels, an adaptive suspension, a rear limited-slip differential, keyless ignition and entry, navigation and a premium Bang & Olufsen stereo.

The S4 shines thanks to its strong supercharged V6, sharp handling and a forgiving nature made possible by Quattro and that optional limited-slip rear differential. Even driven aggressively, the S4 imparts confidence to the driver. Grip is tenacious and the chassis is communicative. Even so, ride comfort is commendable and cabin noise is pleasantly hushed.

Used Audi S4 Models
The current Audi S4 represents the fifth generation in the model's lineage, debuting in 2010. An optional rearview camera and blind-spot warning system were made available the following year. For 2013, the S4 received a slight styling update (with more angular grille/headlights) and a revised MMI control interface. That year also saw the switch to electric-assisted steering. Apart from lacking Audi Drive Select as standard (it was optional though), these latter S4s are similar to today's version.

The previous, fourth-generation Audi S4 was available in a variety of body styles. The sedan and wagon (Avant) were sold from 2006-'08, while the convertible (cabriolet) lasted from 2007-'09. Relative to third-generation S4s, the fourth generation offered refreshed styling, a revised chassis and a more sport-biased Quattro system, though these changes represented more of a revitalization effort rather than a complete redesign.

Under this S4's hood was a 4.2-liter V8 that generated 340 hp and 302 lb-ft of torque. Power was sent to the Quattro all-wheel-drive system through either a six-speed manual transmission or a six-speed automatic. As with today's S4, this generation model had additional performance-oriented modifications, including a sport-tuned suspension, 18-inch wheels with high-performance tires and more powerful brakes.

Inside, front occupants were treated to a comfortable and functional cockpit. The backseat was more cramped than in the current car, and the electronics systems may seem a bit dated now. The electronics interface, in particular, could be quite frustrating to use with the optional navigation system installed. Leather seating was standard, and interior trim, lighting and controls were all of high quality.

The similar third-generation S4 was offered for 2004 and '05. This was the model that introduced the 340-hp V8 engine and expanded S4 availability to the sedan, wagon and convertible body styles. As with the fourth-gen S4, transmission choices were either a six-speed manual or a six-speed automatic. At the time, the installation of such a powerful V8 in a small car raised some eyebrows, and indeed it boasted more power than BMW's contemporary M3 or Mercedes' C32.

In reviews of the third- and fourth-generation S4, we commented favorably about the car's broad power band, multiple body styles and high-quality interior. Downsides were a cramped backseat and handling that wasn't as razor-sharp as the M3's. The fact that the current S4 no longer has the V8 engine should make these generations a more novel, collectible choice in coming years.

Previous to these newer S4s, there were two other generations of the Audi S4 -- a second-generation vehicle, available from the 2000-'02 model years, and a first generation, available from 1992-'94.

The second-generation model was based on the A4 sedan and wagon of its day, and it came equipped with a twin-turbo 2.7-liter V6 engine rated at 250 hp. Quattro was standard, and Audi offered either a six-speed manual transmission or a five-speed automatic. In Edmunds' S4 road tests at the time, we found the car very enjoyable to drive, as it struck an ideal balance between outright performance and everyday comfort. Our main complaint about this model was the familiar lack of rear-seat room.

The first-generation Audi S4 was a performance variant of the Audi 100 sedan (later A6) sold from 1992-'94. These S4s came with a turbocharged inline five-cylinder engine capable of 227 hp. Quattro was again standard, and these cars were equipped with a five-speed manual transmission only. After 1994, they became known as the S6. First-generation S4s are a relatively rare find today.

User Reviews:

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  sleeper wagon - 2004 Audi S4
  By lisainla - July 13 - 2:00 am

  I think that this car was custom made for me by the powers that be. My husband knew he was sunk as soon as I sat in it! The wagon is such a sleeper, just to see the look on the faces of the wanna be racers I blow away on the freeway makes me giddy. Yet, the wagon is extremely versatile. I have 2 large labs that I cart around in the cargo space, with the seats up! I take long trips with the dogs and the car is super comfortable and performs in all types of weather. The seats hug you comfortably and overall the cars performance it stellar. I LOVE IT!! Was gonna hold out for the BMW545it, but glad I didnt.

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  audii - 2004 Audi S4
  By al-bon - July 7 - 2:00 am

  Audi S4 is a great car all the way around..... only if it had better gas milage it would be a 10

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  Stable rocketry! - 2004 Audi S4
  By timcrow - July 7 - 2:00 am

  Quite simply put, one of the most stable rides out there. An incredibly well thought out machine at a price point that makes more expensive "comparable" cars in class appear laughably over-valued. Ask any German national, by the way, which of the big three manufacturers cranks out the finest auto and without fail, theyll say Audi (Ive tested this on several occasions). Do yourself a favor and at least take an S4 for a test drive.

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  Little Rocket - 2004 Audi S4
  By Chi-town S4 - July 7 - 2:00 am

  This was quite an upgrade from the 2000 S4 2.7 Turbo I owned before. This car is nothing but fun to drive (except in rush hour traffic). Besides the ride of the car, its also a very classy looking car (I love the chrome mirrors). I have yet to meet an M3 driver who isnt impressed with this S4. I recommend this car to anyone considering it.

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  S4 Cab,,,, the best of all worlds! - 2004 Audi S4
  By tmS4cab - July 2 - 2:00 am

  Amazing looks, performance, comfort, safety, room for 4 real people, top- down fun and .... all-wheel drive! The 6 spd. stick is precise with crisp, short throws. Keeping engine rpms below 4500 in this break-in period, but there is a ton of torque on hand in any gear! Cant wait to "air it out". Ordered the car back in January and took delivery *exactly* when expected. The Light Silver Alcantra interior is rich and luxurious and contrasts against the Black trim beautifully. Chose the optional Carbon-Fiber trim rather than the dark brown walnut. Ordered mine Moro (dark) Blue with matching Blue top. Car feels *very* solid, hugging the road.

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  Why has no one heard of the S4? - 2004 Audi S4
  By chrisincalif - June 23 - 2:00 am

  I had an 03 A4 CVT (hated CVT) and upgraded to my S4. I actually laughed out loud the first time I drove it. An amazing car. The sound of the engine alone makes you want to get behind the wheel. The all-wheel drive provides a secure feeling around corners. Design-wise, no domestic, BMW or Benz or Japanese car even compares. I had a Nogaro blue with enhanced black/blue interior. The seats "hug" you and makes you feel secure while driving.

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  2004 V8 vs. 2001 Biturbo - 2004 Audi S4
  By adeshpa - June 18 - 2:00 am

  I traded in my 2001 S4 biturbo for a 2004 6-spd. The 2004 is very quick (with MT clocking a 5 second 60 MPH sprint, versus the factorys 5.6 est.), with an incredibly usuable torque curve. Unlike the 2001, there is no lag in acceleration, and it pulls hard from 2k RPM all the way to 5k before tailing off--you dont have to work the engine hard to bring a smile to your face. The torque is noticeable on the highways as well, where 60-90 MPH sprints pass by in a blur. Minuses--Fit and finish is poorer, mileage is terrible, harsh ride (esp. if you live in the NE), adaptive steering and handling generally can be irritating. Gripes are small.So far I love it.

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  Fun to drive, nightmare to own - 2000 Audi S4
  By nomoreaudijunk - June 7 - 2:00 am

  Issues included: A/C system was improperly assembled and poured water into the passenger seat. Water pump, catalytic converters, oxygen sensors, and coil packs - all replaced. When I brought it in last week, the ABS computer was shot. Cruise control switch shot. This car is a piece of crap. When the cats and pre-cats were replaced under an emissions system warranty, at Metro, I had to pay for new O2 sensors. They were an Audi mandated repair along with the converters, but Audi wouldnt cover it EVEN THOUGH THEY REQUIRED IT AS PART OF THE WARRANTY REPAIR. I got Audi customer service to cover half the cost, and they acted like they were doing me a favor.

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  Love my new S4 Cabrio - 2004 Audi S4
  By KenSchwartz - June 7 - 2:00 am

  This car is quick off the line with true appeal on turns. The SMG paddle shifters give the control of a stick without the annoyance of a clutch in traffic. Stereo is clear, seats are so comfortable. This thing is just great in turns and loves to jump off the line. I had a 1999 Corvette and I like this more - cant believe Im saying this. Mine- brilliant red with silver/wood interior.

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  Racecar fun, SUV utility and MPG - 2004 Audi S4
  By christhegoalie - June 6 - 2:00 am

  I am one of the 10 Americans that LOVE wagons and this one is as good as you can buy. I have the one from the ads, blue w/ blue and black int. Looks awesome. V8 is stellar! (especially after you add the APR complete exhaust sys.) Great brakes (I might even leave them factory!) Decent suspension (likely to upgrade) Downside: Even being super nice I cant get 20 MPG.