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Compare 2009 Audi A8 vs 2008 Mercedes-Benz S Class

2009 Audi A8 Change
2008 Mercedes-Benz S Class Change
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Selected Style 4-Door Sedan 4-Door Sedan 5.5L V8 RWD
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Body Style

Engine

Drivetrain

Trim

Other

Style MPG City MPG Hwy Invoice MSRP
4-Door Sedan RWD 5.5L V8 14 21 $80,631 $86,700
4-Door Sedan 4MATIC 5.5L V8 14 20 $83,421 $89,700
4-Door Sedan RWD 6.3L V8 AMG 11 17 $118,110 $127,000
4-Door Sedan RWD 5.5L V12 11 17 $134,106 $144,200
4-Door Sedan RWD 6.0L V12 AMG 11 17 $180,420 $194,000
Pricing
Invoice Price
$68,867
$80,631
Manufacturer Suggested Retail Price
$74,050
$86,700
Monthly Payment Estimate
$1234 / month
$1445 / month
Dealer Price Quotes
The Car Connection's Take
TCC Rating
8.4
/ 10
TCC Rating
How does the
TCC Rating work?
The TCC Rating is a clear numeric rating value based on a 10-point scale that reflects the overall opinion of our automotive experts on any vehicle and rolls up ratings we give each vehicle across sub-categories you care about like performance, safety, styling and more.

Our rating also has simple color-coded “Stop” (red), “Caution” (orange),
or “Go” (green) messages along with the numerical score so you can easily understand where we stand at a glance.

Our automotive experts then also collect and show you what other websites say about these different aspects of any vehicle. We do this leg work for you to simplify your research process.

Learn more about how we rate and review cars here.

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8.8
/ 10
TCC Rating
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Read Our Full Review
TCC’s Bottom Line The 2009 Audi A8 and A8 L are nimble, refined luxury sedans that still stand out from the crowd. Hark! The 2008 Mercedes-Benz S-Class is loaded with top safety and comfort-oriented technologies and is one of the best luxury sedans in the world.
TCC Likes
TCC Dislikes
Fuel Economy
Fuel Economy - City 16 mpg 14 mpg
Fuel Economy - Highway 23 mpg 21 mpg
Vehicle
EPA Classification Large Large
Interior Dimensions
Passenger Capacity 5 5
Second Head Room (in) 38.0 38.5
Second Shoulder Room (in) 57.5 58.7
Front Leg Room (in) 41.4 41.9
Front Hip Room (in) - TBD - - TBD -
Passenger Volume (ft³) 114.9 109.0
Second Leg Room (in) 37.6 42.3
Front Head Room (in) 37.3 37.8
Second Hip Room (in) - TBD - - TBD -
Front Shoulder Room (in) 59.1 59.1
Exterior Dimensions
Min Ground Clearance (in) 4.72 - TBD -
Length, Overall (in) 199.3 205.0
Height, Overall (in) 56.9 58.0
Track Width, Rear (in) 63.3 63.2
Wheelbase (in) 115.9 124.6
Liftover Height (in) - TBD - - TBD -
Width, Max w/o mirrors (in) 74.6 73.7
Track Width, Front (in) 63.9 63.2
Cargo Area Dimensions
Trunk Volume (ft³) 14.6 16.3
Brakes
Drum - Rear (Yes or ) NA NA
Brake ABS System 4-Wheel 4-Wheel
Disc - Rear (Yes or ) Yes Yes
Rear Brake Rotor Diam x Thickness (in) 12.2 x 0.87 11.8 x - TBD -
Brake Type Pwr Power
Rear Drum Diam x Width (in) NA NA
Disc - Front (Yes or ) Yes Yes
Front Brake Rotor Diam x Thickness (in) 14.2 x 1.34 13.2 x - TBD -
Fuel Tank
Fuel Tank Capacity, Approx (gal) 23.8 23.8
Steering
Steering Ratio (:1), Overall - TBD - - TBD -
Turning Diameter - Curb to Curb (ft) 41.0 40.0
Steering Type Pwr Rack & Pinion Vehicle-Speed-Sensitive
Lock to Lock Turns (Steering) 2.8 - TBD -
Turning Diameter - Wall to Wall (ft) - TBD - - TBD -
Tires
Front Tire Size P245/40HR18 P255/45R18
Spare Tire Size P245/40HR18 - TBD -
Front Tire Order Code NA NA
Spare Tire Order Code NA NA
Rear Tire Size P245/40HR18 P255/45R18
Rear Tire Order Code NA NA
Trailering
Dead Weight Hitch - Max Trailer Wt. (lbs) - TBD - NA
Wt Distributing Hitch - Max Trailer Wt. (lbs) - TBD - NA
Dead Weight Hitch - Max Tongue Wt. (lbs) - TBD - NA
Wt Distributing Hitch - Max Tongue Wt. (lbs) - TBD - NA
Weight Information
Base Curb Weight (lbs) 4321 4465
Wheels
Spare Wheel Size (in) 18 x 8.5 - TBD -
Rear Wheel Material Alloy Aluminum
Rear Wheel Size (in) 18 x 8.5 18 x 8.5
Front Wheel Material Alloy Aluminum
Spare Wheel Material Alloy - TBD -
Front Wheel Size (in) 18 x 8.5 18 x 8.5
Cooling System
Total Cooling System Capacity (qts) 12.2 - TBD -
Electrical
Maximum Alternator Capacity (amps) 190 - TBD -
Cold Cranking Amps @ 0° F (Primary) - TBD - - TBD -
Engine
Engine Type Gas V8 Gas V8
Fuel System FSI SFI
SAE Net Torque @ RPM 325 @ 3500 391 @ 2800 - 4800
Engine Order Code NA NA
Displacement 4.2L/254 5.5L/333
SAE Net Horsepower @ RPM 350 @ 6800 382 @ 6000
Mileage
Fuel Economy Est-Combined (MPG) 18 -
EPA Fuel Economy Est - Hwy (MPG) 23 21
EPA Fuel Economy Est - City (MPG) 16 14
Transmission
Reverse Ratio (:1) 3.40 3.42 (R2 2.23)
Second Gear Ratio (:1) 2.34 2.86
Trans Order Code NA NA
Final Drive Axle Ratio (:1) 3.32 2.65
Fourth Gear Ratio (:1) 1.14 1.37
Trans Description Cont. Automatic Automatic
Sixth Gear Ratio (:1) 0.69 0.82
First Gear Ratio (:1) 4.17 4.38
Clutch Size (in) NA NA
Third Gear Ratio (:1) 1.52 1.92
Trans Type 6 7
Drivetrain All-Wheel Drive Rear Wheel Drive
Fifth Gear Ratio (:1) 0.87 1.00
Trans Description Cont. Again NA NA
Seventh Gear Ratio (:1) - 0.73
Summary
Body Style 4 Door Sedan 4 Door Sedan
Vehicle Name Audi A8 Mercedes-Benz S-Class
Suspension
Stabilizer Bar Diameter - Front (in) - TBD - - TBD -
Suspension Type - Rear Adaptive Air Independent
Suspension Type - Rear (Cont.) NA w/5-Arm
Shock Absorber Diameter - Rear (mm) - TBD - - TBD -
Suspension Type - Front Adaptive Air Independent
Stabilizer Bar Diameter - Rear (in) - TBD - NA
Suspension Type - Front (Cont.) NA w/4-Link
Shock Absorber Diameter - Front (mm) - TBD - - TBD -
Emissions
EPA Greenhouse Gas Score 4 -
 
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