Audi S8 vs. Mercedes-Benz SL-Class

 2018 Audi S8 4dr All-wheel Drive quattro Sedan 4.0T Plus 1300-OEM Exterior 3/4 Front Left-Facing Primary
VS
 Black

Key Specs

Kelley Blue Book Value

Kelley Blue Book
$115,900
$88,200

Expert Rating

Expert Rating

Owner Reviews

Owner Reviews
3.33 / 5
3 Reviews

Horsepower

Horsepower
605 hp
362 hp

Bluetooth

Bluetooth

BackUp Camera

BackUp Camera

Engine Type

Engine Type
4.0 TFSI 8 Cylinder 605 HP
3.0L Bi

Interior Features

Sun Roof

Sun Roof

Alarm

Alarm

BackUp Camera

BackUp Camera

HeadsUp Display

HeadsUp Display
Optional

Keyless Entry

Keyless Entry

Universal Garage Door Opener

Universal Garage Door Opener

Rain Sensing Wipers

Rain Sensing Wipers

Heated Mirrors

Heated Mirrors

Heated Steering Wheel

Heated Steering Wheel
Optional

Power Mirrors

Power Mirrors
Optional

Steering Wheel Controls

Steering Wheel Controls

Cruise Control

Cruise Control

Power Windows

Power Windows
Optional

Rear Defrost

Rear Defrost
Optional

Premium Sound System

Premium Sound System
Optional

Front Leg Room

Front Leg Room
41.4 in.
42.9 in.

Front Head Room

Front Head Room
37.2 in.
39.1 in.

Rear Leg Room

Rear Leg Room
38.7 in.
8.5 cu. ft.

Bluetooth

Bluetooth

MP3 Player

MP3 Player

Satellite Radio

Satellite Radio

WiFi Hotspot

WiFi Hotspot

AUX Input

AUX Input

CD Player

CD Player

Climate Control

Climate Control

AC

AC

Navigation System

Navigation System

Standard Seat

Standard Seat

Passengers

Passengers
5
2

Power Driver Seat

Power Driver Seat
Optional

Power Passenger Seat

Power Passenger Seat
Optional

Heated Front Seats

Heated Front Seats
Optional

Heated Rear Seats

Heated Rear Seats
Optional
Optional

Cooled Front Seats

Cooled Front Seats

Seat Memory

Seat Memory
Optional

Pass Through Rear Seat

Pass Through Rear Seat
Optional

Exterior Features

Standard Wheels

Standard Wheels

Hands Free Liftgate

Hands Free Liftgate
Optional

Power Folding Mirror

Power Folding Mirror

Tire Width

Tire Width
P275/35YR21
P255/35YR19

Wheelbase

Wheelbase
117.9 in.
101.7 in.

Turning Radius

Turning Radius
40.4 ft.
36.2 ft.

Length

Length
202.6 in.
182.3 in.

Width

Width
76.7 in.
73.9 in.

Mechanical Specs

Weight

Weight
4685 lbs.
3826 lbs.

Horsepower

Horsepower
605 hp
362 hp

Torque

Torque
517 ft. lbs.
369 ft. lbs.

Turbocharged

Turbocharged

4wheel Disc Brakes

4wheel Disc Brakes

Limited Slip Differential

Limited Slip Differential

Performance Tires

Performance Tires
V6 Cylinder

Engine Cylinders

Engine Cylinders
8 Cylinders
Rear Wheel Drive

Fuel Capacity

Fuel Capacity
21.7 gal.
19.8 gal.

Combined

Combined
19 mpg
24 mpg

City

City
14 mpg
20 mpg

Highway

Highway
24 mpg
28 mpg

Active Suspension

Active Suspension
Optional

Manual Mode

Manual Mode
Optional

Safety Features

Spare Tire

Spare Tire
Temporary Spare Tire

ABS Brakes

ABS Brakes

Automatic Headlights

Automatic Headlights

Tire Pressure Monitor System

Tire Pressure Monitor System

Child Safety Locks

Child Safety Locks

Stability Control

Stability Control

Traction Control

Traction Control

Auto Leveling Headlights

Auto Leveling Headlights
Optional

Automated Emergency Braking

Automated Emergency Braking

Blind Spot Monitor

Blind Spot Monitor
Optional

Lane Keeping Assist

Lane Keeping Assist
Optional
Optional

Lane Departure Warning

Lane Departure Warning
Optional
Optional

Driver Airbag

Driver Airbag

Passenger Airbag

Passenger Airbag

Front Side Airbag

Front Side Airbag

Rear Side Airbag

Rear Side Airbag

Front Head Airbag

Front Head Airbag

Rear Head Airbag

Rear Head Airbag

Tech Specs

Vehicle Name

Vehicle Name
Audi S8 plus
Mercedes-Benz SL

Body Style

Body Style
quattro Sedan
Roadster

Drivetrain

Drivetrain
All Wheel Drive
Rear Wheel Drive

EPA Classification

EPA Classification
Mid-Size Cars
Two-Seaters

Passenger Capacity

Passenger Capacity
5
2

Passenger Volume

Passenger Volume
115.1 ft³.
50.5 ft³.

Base Curb Weight

Base Curb Weight
4685 lbs.
3826 lbs.

Fuel Economy Est-Combined

Fuel Economy Est-Combined
18 mpg.
23 mpg.

EPA Fuel Economy Est - City

EPA Fuel Economy Est - City
14 mpg.
20 mpg.

EPA Fuel Economy Est - Hwy

EPA Fuel Economy Est - Hwy
24 mpg.
28 mpg.

Engine Type

Engine Type
Twin Turbo Premium Unleaded V-8
Twin Turbo Premium Unleaded V-6

Displacement

Displacement
4.0 L/244
3.0 L/183

Fuel System

Fuel System
Gasoline Direct Injection
Gasoline Direct Injection

Trans Type

Trans Type
8
421

Trans Description Cont.

Trans Description Cont.
Automatic w/OD
9

First Gear Ratio (:1)

First Gear Ratio (:1)
4.71
Automatic w/OD

Second Gear Ratio (:1)

Second Gear Ratio (:1)
3.14
5.35

Third Gear Ratio (:1)

Third Gear Ratio (:1)
2.11
3.24

Fourth Gear Ratio (:1)

Fourth Gear Ratio (:1)
1.67
2.25

Fifth Gear Ratio (:1)

Fifth Gear Ratio (:1)
1.28
1.64

Sixth Gear Ratio (:1)

Sixth Gear Ratio (:1)
1.00
1.21

Reverse Ratio (:1)

Reverse Ratio (:1)
3.32
1.00

Final Drive Axle Ratio (:1)

Final Drive Axle Ratio (:1)
3.20
4.80

Tons/yr of CO2 Emissions @ 15K mi/year

Tons/yr of CO2 Emissions @ 15K mi/year
9.8
3.07

Maximum Alternator Capacity (amps)

Maximum Alternator Capacity (amps)
190
7.6

Suspension Type - Front

Suspension Type - Front
Multi-Link
Multi-Link

Suspension Type - Rear

Suspension Type - Rear
Multi-Link
Multi-Link

Suspension Type - Front (Cont.)

Suspension Type - Front (Cont.)
Multi-Link
Multi-Link

Suspension Type - Rear (Cont.)

Suspension Type - Rear (Cont.)
Multi-Link
Multi-Link

Front Tire Size

Front Tire Size
P275/35YR21
P255/35YR19

Rear Tire Size

Rear Tire Size
P275/35YR21
P285/30YR19

Spare Tire Size

Spare Tire Size
Compact
19 - 19 X 8.5 in.

Front Wheel Size

Front Wheel Size
21 X 9 in.
19 - 19 X 9.5 in.

Rear Wheel Size

Rear Wheel Size
21 X 9 in.
Aluminum

Spare Wheel Size

Spare Wheel Size
Compact in.
Aluminum

Front Wheel Material

Front Wheel Material
Aluminum
Rack-Pinion

Rear Wheel Material

Rear Wheel Material
Aluminum
36.2 ft.

Spare Wheel Material

Spare Wheel Material
Aluminum
4-Wheel Disc

Steering Type

Steering Type
Rack-Pinion
4-Wheel

Turning Diameter - Curb to Curb

Turning Diameter - Curb to Curb
40.4 ft.
Yes

Brake Type

Brake Type
4-Wheel Disc
Yes

Brake ABS System

Brake ABS System
4-Wheel
14.2 in.

Disc - Front

Disc - Front
Yes
12.6 in.

Disc - Rear

Disc - Rear
Yes
19.8 gal.

Front Brake Rotor Diam x Thickness

Front Brake Rotor Diam x Thickness
15.7 in.
39.1 in.

Rear Brake Rotor Diam x Thickness

Rear Brake Rotor Diam x Thickness
14 - 14.6 in.
42.9 in.

Fuel Tank Capacity, Approx

Fuel Tank Capacity, Approx
21.7 gal.
55.5 in.

Front Head Room

Front Head Room
37.2 in.
53.6 in.

Front Leg Room

Front Leg Room
41.4 in.
101.7 in.

Front Shoulder Room

Front Shoulder Room
59.1 in.
182.3 in.

Second Head Room

Second Head Room
38.1 in.
73.9 in.

Second Leg Room

Second Leg Room
38.7 in.
51.2 in.

Second Shoulder Room

Second Shoulder Room
57.8 in.
62.8 in.

Wheelbase

Wheelbase
117.9 in.
63 in.

Length, Overall

Length, Overall
202.6 in.
8.5 ft³.

Width, Max w/o mirrors

Width, Max w/o mirrors
76.7 in.
0.86

Height, Overall

Height, Overall
57.4 in.
0.72

Track Width, Front

Track Width, Front
64.3 in.
SL

Track Width, Rear

Track Width, Rear
63.9 in.
Luxury Sport

Trunk Volume

Trunk Volume
14.2 ft³.
Convertible

Seventh Gear Ratio (:1)

Seventh Gear Ratio (:1)
0.84
3.0

Eighth Gear Ratio (:1)

Eighth Gear Ratio (:1)
0.67
DOHC

Model Group

Model Group
S8
aluminum

Vehicle Segment

Vehicle Segment
Luxury Sport
6

Vehicle Type

Vehicle Type
Sedan
4