Audi S4: Difference between revisions

| name = Audi S4

| image = 2018 Audi S4 3.0T Premium Plus in Daytona Gray Pearl, front right.jpg

| manufacturer = [[Audi AG]]

| aka =

| class = [[Compact executive car]] ([[D-segment|D]])

| layout = [[F4 layout]]

|assembly = Germany: [[Neckarsulm]]

|successor = [[Audi S6#C4|Audi C4 S6]], [[#B5|Audi B5 S4]]

|platform = [[Volkswagen Group C platform#C4|Volkswagen Group C4]]

|transmission = 5-speed [[manual transmission|manual]]<br />6-speed manual<br />4-speed [[automatic transmission|automatic]]<ref name="ETKA"/>

|wheelbase = {{convert|2692|mm|1|abbr=on}}

}}

{{See also|Audi S6#C4}}

[[File:Audi S4 Avant (C4).jpg|left|thumb|Audi S4 Avant (C4)]]

 

A more powerful, more expensive and more exclusive variant known first as the '''S4 Plus''' and later as the '''S6 Plus''' was available from October 1992 through to July 1994.<ref name="ETKA"/> Built in very small numbers, the "Plus" models featured numerous performance enhancing upgrades; including the use of Audi's 4.2-litre [[V8 engine]] in place of the then current [[straight-five engine|inline-five engine]].

The C4 variant S4 ended factory production after less than three years in July 1994.<ref name="ETKA"/>

 

 

===C4 powertrain===

 

Both five- and six-speed [[manual transmission]]s (parts code prefix: 01E, identification codes: five-speed: CBD, CET, six-speed: CBL, CMG) were offered to European customers, but a five-speed manual was the only transmission available in North America; a four-speed [[automatic transmission]] (parts code prefix: 01F, identification code: CBF) was available as an option worldwide.<ref name="ETKA"/> Front and rear axle final drive [[gear ratio|ratio]] is either 4.111 or 3.889 (dependent on transmission type), and the rear axle (parts code prefix: 017, identification codes: AAT, AET) uses a driver-selectable electro-pneumatic-mechanical switchable [[locking differential|diff lock]].<ref name="ETKA"/>

There were two different types of high performance brake systems on offer for the C4 S4.<ref name="ETKA"/> All S4s' initially had {{convert|310|mm|2|abbr=on}} diameter by {{convert|25|mm|3|abbr=on}} thick, radially ventilated [[disc brake]]s up front, each with an [[Continental AG|ATE]] single-piston sliding caliper inside a 'UFO' styled bell-shaped disc. With the introduction of the V8 engine, a new front brake setup became standard; again the discs used radial ventilation, but these front discs were now sized at {{convert|314|mm|2|abbr=on}} by {{convert|30|mm|3|abbr=on}} - with a conventionally mounted [[LucasVarity|Lucas]]-[[Lucas Industries#Girling|Girling]] caliper in an external position over the disc. US models had smaller {{convert|276|mm|2|abbr=on}} discs. The rear brakes, {{convert|269|mm|2|abbr=on}} by {{convert|20|mm|3|abbr=on}} and also radially ventilated - remained the same throughout C4 production; they used a Lucas-Girling single-piston sliding caliper with an integrated cable-actuated handbrake mechanism. A [[Robert Bosch GmbH|Bosch]] three-channel operation (four-channel sensing) [[anti-lock braking system|Anti-lock Braking System]] (ABS) with a mechanical load sensing valve for the rear brakes was standard throughout production.<ref name="ETKA"/>

 

 

==B5 (''Typ'' 8D, 1997–2002)==

}}

[[File:Audi-S4-Avant-1.jpg|thumb|left|Audi B5 S4 Avant]]

The second generation S4 ('''''Type'' 8D'''), also known as the '''Audi S4 quattro''' debuted in 1997, with factory production commencing October 1997,<ref name="ETKA"/> as part of the facelifted [[Volkswagen Group B platform#B5|B5 platform]] [[Audi A4#B5|Audi A4]] line-up, although it was not available in North America until late 1999.

 

 

Several years after it was sold new, the B5 S4 remains a potent enthusiast car, and as featured in the December 2007 issue of ''Sport Compact Car'' magazine, a heavily modified, Torque Factory tuned S4 won a comparison test against several other extreme performance cars.<ref>Sport Compact Car magazine [http://www.sportcompactcarweb.com/uscc/0712_sccp_2007_ultimate_street_car_challenge/results.html 2007 Ultimate Street Car Challenge] {{Webarchive|url=https://web.archive.org/web/20080314061229/http://www.sportcompactcarweb.com/uscc/0712_sccp_2007_ultimate_street_car_challenge/results.html |date=14 March 2008 }} ''"The Audi S4 ... showed its capability with consistently strong finishes in the acceleration, dyno, braking and driveability tests"''</ref>

The B5 S4 brake system<ref name="ETKA"/> consisted of radially ventilated discs, {{convert|321|mm|2|abbr=on}} in diameter by {{convert|30|mm|2|abbr=on}} thick up front, and {{convert|256|mm|2|abbr=on}} by {{convert|22|mm|2|abbr=on}} at the rear. Two-piston [[LucasVarity|Lucas]] HP2 brake calipers at the front (with four pads per caliper), with Lucas single-piston sliding brake calipers at the rear. A [[Robert Bosch GmbH|Bosch]] ABS&nbsp;5.3 four-channel [[anti-lock braking system|Anti-lock Braking System]] (with [[electronic brakeforce distribution|Electronic Brakeforce Distribution]] (EBD) and Electronic Differential Lock (EDL) - and later with ESP or [[electronic stability control|Electronic Stability Programme]]), coupled with a [[vacuum servo]] completed the system.

 

 

===B5 colors & optional equipment===

==B6 (''Typ'' 8E/8H, 2003–2005){{anchor|B6|8E|8H}}==

{{Infobox automobile

}}

[[File:Audi b6 s4 2005 rear.png|thumb|left|2003–2005 S4 (B6) saloon (US)]]

B6 S4 brakes<ref name="ETKA"/> consisted of radially ventilated [[disc brake]]s front and rear. The front discs are sized at {{convert|345|mm|2|abbr=on}} in diameter by {{convert|30|mm|3|abbr=on}} thick, and are clamped by [[Continental AG|Continental Teves-ATE]] FNRG-60 single-piston sliding [[brake caliper]]s. The rears are {{convert|300|mm|2|abbr=on}} by {{convert|22|mm|3|abbr=on}}, and again use single-piston sliding calipers, with an integrated cable-operated [[hand brake]] mechanism. A [[Robert Bosch GmbH|Bosch]] ESP&nbsp;5.7 [[electronic stability control|Electronic Stability Programme]] system, complete with [[anti-lock braking system|Anti-lock Braking System]] (ABS), [[electronic brakeforce distribution|Electronic Brakeforce Distribution]] (EBD), [[Emergency Brake Assist]] (EBA), Electronic Differential Lock (EDL) and Anti-Slip Regulation (ASR) - also known as [[traction control system]], coupled with a dual-rate tandem [[vacuum servo]] provided the brake actuation.

 

 

===B6 body & interior===

Discrete lower door trims, along with the now trademark [[Audi S and RS models#S models|Audi 'S' model]] vertical-emphasis line grille, and solid aluminium (later replaced with plastic covered by aluminium) exterior [[wing mirror|door mirrors]], and S4 badging front and rear are all that visually distinguish the S4 from its related A4 brethren. In the interior, front and rear [[Recaro]] seats (fronts fully electric with the option of heated seats), as well as S4 logos in the instrument panel and door sills complete the detail.{{-}}

 

==B7 (''Typ'' 8E/8H, 2005–2009){{anchor|B7|8EC|8ED|8HE}}==

| aka =

| production = Nov 2004–Jun 2008<ref name="ETKA"/><br />Jan 2006–2008 (cabrio)

| predecessor = Audi B6 S4

| successor = Audi B8 S4

In [[auto racing|motor racing]], [[Audi Performance and Racing|APR Motorsport]] has currently entered a B8 S4 in the Grand-Am [[Continental Tire Sports Car Challenge]] Grand Sport (GS) class.<ref>Grand-Am.com [http://www.grand-am.com/schedule/entrylist.cfm?series=k&eid=1500 Fresh From Florida 200, entry list] {{webarchive|url=https://web.archive.org/web/20100116234121/http://www.grand-am.com/schedule/entrylist.cfm?series=k&eid=1500 |date=16 January 2010 }}</ref>

 

{{Infobox automobile

| name = Sixth generation (B9/8W)

| image = 2017 Audi S4 TFSi Quattro Automatic Sedan 3.0 Front.jpg

| caption = 2017 Audi S4 quattro 3.0 TFSI (UK)

| assembly = Germany: [[Ingolstadt]]

| body_style = 4-door [[sedan (automobile)|saloon/sedan]],<ref name="ETKA"/><br />5-door [[station wagon|estate/wagon]] (Avant)<ref name="ETKA"/>

| platform = [[Volkswagen Group B platform#MLB|Volkswagen Group MLB/MLP]]

}}

 

 

[[File:2017 Audi S4 TFSi Quattro Automatic 3.0.jpg|thumb|left|Audi S4 Avant quattro 3.0 TFSI (UK)]]

 

==See also==

*[[Audi S and RS models]]

 

 

{{Audi}}

{{Audi vehicles timeline (North America)}}