The Comparative Analysis :
Mercedes S 420 CDI 7G-TRONIC (06 - 09) vs. Audi A8 4.2 TDI quattro tiptronic (10 - 13)
€ 91,100
€ 92,700
€ 91,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 92,700
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The dimensions of these vehicles differ slightly. The Mercedes S 420 CDI is 2.2 inches shorter, 3.1 inches narrower and 0.5 inches taller than the Audi A8 4.2 TDI.
Mercedes S 420 CDI
Audi A8 4.2 TDI
58
73.7
83.5
57.5
76.7
83.1
73.7 in
Width
76.7 in
83.5 in
Width Incl. Mirrors
83.1 in
58 in
Height
57.5 in
119.5
200
117.8
202.2
200 in
Length
202.2 in
119.5 in
Wheelbase
117.8 in
Vehicle Weight
Mercedes S 420 CDI
Audi A8 4.2 TDI
4608 lb
Curb Weight
4564 lb
5820 lb
Gross Vehicle
Weight
Weight
5864 lb
Weight Difference:
44 lb
0.95 %
General
Mercedes S 420 CDI
Audi A8 4.2 TDI
W221
Generation
D4 (4H)
Sedan
Car Body Style
Sedan
Diesel
Fuel Type
Diesel
Rear-wheel drive
Drivetrain
Permanent all-wheel drive (AWD)
7-speed automatic transmission
Transmission
8-speed automatic transmission
Engine
Mercedes S 420 CDI
Audi A8 4.2 TDI
V8 diesel engine with turbocharger
Engine Type
V8 diesel engine with two turbochargers (biturbo)
Mercedes-Benz OM 629
Engine Series
OM 629.911
Engine Code
CDSB
4
Valves
4
8
Cylinders
8
4 L / 196 cu in
Displacement
4.1 L / 201 cu in
316 hp
at 3600 rpm
Power
346 hp
at 4000 rpm
Mercedes S 420 CDI
316 hp
346 hp
Audi A8 4.2 TDI
538 lb‑ft
at 2200 rpm
Max. Torque
590 lb‑ft
at 1750 rpm
Mercedes S 420 CDI
538 lb‑ft
590 lb‑ft
Audi A8 4.2 TDI
Performance
Mercedes S 420 CDI
Audi A8 4.2 TDI
155 mph
Maximum Speed
155 mph
6 sec
Acceleration 0 to 62 mph
5.5 sec
62 mph
62
mph
mph
272 ft
0.000 sec
Mercedes S 420 CDI
62 mph
62
mph
mph
249 ft
0.000 sec
Audi A8 4.2 TDI
▶ REPLAY
14.58 lb/hp
Weight-to-Power Ratio
13.19 lb/hp
Mercedes S 420 CDI
14.58 lb/hp
13.19 lb/hp
Audi A8 4.2 TDI
Fuel Economy / Emissions
Mercedes S 420 CDI
Audi A8 4.2 TDI
Fuel Economy
25 mpg
combined
32 mpg
Mercedes S 420 CDI
25 mpg
32 mpg
Audi A8 4.2 TDI
18 mpg
city
25 mpg
33 mpg
highway
No data
23.8 gal
Fuel Tank Capacity
23.8 gal
595 mi
Range
756 mi
Mercedes S 420 CDI
595 mi
756 mi
Audi A8 4.2 TDI
Environmental Impact
193.4 kWh
Total Energy Consumption
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
152.2 kWh
Mercedes S 420 CDI
193.4 kWh
152.2 kWh
Audi A8 4.2 TDI
Euro 4 III
Emission Standard
Euro 5
398 g/mi (NEFZ)
CO2 Emissions
314 g/mi (NEFZ)
Practical Convenience
Mercedes S 420 CDI
Audi A8 4.2 TDI
4
Doors
4
5
No. of Seats
5
1213 lb
Maximum Payload
1301 lb
15.9 cu ft
Trunk Volume
14.4 cu ft
No data
Cargo Volume (Seats Down)
No data
