Audi S4 Avant vs Audi S6 Compare price, expert/user reviews, mpg, engines, safety, cargo capacity and other specs at a glance.

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Expert Reviews Reviews from CarGurus experts.

2008 Audi S4 Avant
quattro AWD

There are few changes for 2008 to Audi's sports car in wagon configuration. Reviewers, claiming that wagons are coming back, found Audi's unique combination of power, handling, and car...

2021 Audi S6
2.9T quattro Premium Plus Sedan AWD
Stephen Edelstein Preview:

Critics complain that the Audi S6 looks too understated, forgetting that some people don’t want to be noticed for what they’re driving. After all, there’s a reason a gray suit is still...

Specs

2008 Audi S4 Avant
quattro AWD
2021 Audi S6
2.9T quattro Premium Plus Sedan AWD
Powertrain 8-Speed Automatic
Drivetrain
AWD
AWD
AWD
Fuel Economy, City
13 MPG
14 MPG
18 MPG
Fuel Economy, Highway
20 MPG
21 MPG
28 MPG
Fuel Tank Volume 16.6 gal 19.3 gal
Engine
Fuel Type
Gasoline
Gasoline
Gasoline
Power
340 hp @ 6,800 RPM
340 hp @ 6,800 RPM
444 hp @ 5,700 RPM
Torque
302 lb-ft @ 3,500 RPM
302 lb-ft @ 3,500 RPM
443 lb-ft @ 1,900 RPM
Cylinders
8 cylinders
8 cylinders
6 cylinders
Compression Ratio
11:1
11:1
10:1
Displacement
4,200 cc
4,200 cc
2,900 cc
Bore x Stroke
3.33 in x 3.65 in
3.33 in x 3.65 in
3.33 in x 3.39 in
Safety
ABS Brakes Standard Standard
Driver Airbag Standard Standard
Passenger Airbag Standard Standard
Front Side Airbags Standard Standard
Rear Side Airbags Optional --
Curtain Airbags Standard Standard
NHTSA Crash Test Results
Front Driver 4 stars --
Front Passenger 4 stars --
Side Driver 5 stars --
Side Rear Passenger 4 stars --
Rollover (pre-2011) 4 stars --
Comfort and Convenience
Sunroof/Moonroof Standard Standard
Leather Seats Standard Standard
Air Conditioning Standard Standard
CD Player Standard --
CD Changer Standard --
Radio Standard Standard
Power Windows Standard Standard
Power Door Locks Standard Standard
Driver Power Seats Standard Standard
Passenger Power Seats Standard Standard
Interior
Maximum Seating 5 seats 5 seats
Front Legroom 41.3 in 41.3 in
Back Legroom 34.3 in 37.4 in
Payload and Towing
Cargo Volume 27.8 cu ft 13.7 cu ft
Maximum Payload -- 1,102 lbs
Exterior
Length 180.6 in 195 in
Width 76.3 in 83.1 in
Height 55.7 in 56.9 in
Wheelbase 104.3 in 115.3 in

Available Options

2008 Audi S4 Avant
quattro AWD
2021 Audi S6
2.9T quattro Premium Plus Sedan AWD

Exterior Colors

  • Avalon Green Metallic
  • Brilliant Black
  • Daytona Gray Pearl Effect
  • FLORETT Silver Metallic
  • Firmament Blue Metallic
  • Glacier White Metallic
  • Ibis White
  • Mythos Black Metallic
  • NAVARRA Blue Metallic
  • Tango Red Metallic
  • Vesuvius Gray Metallic

Option Packages

  • Audi Side Assist W/Pre Sense Rear
  • Black Optic Package
  • Luxury Package
  • S Sport Package
  • S6 Executive Package

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