The Comparative Analysis :

Mercedes S 420 CDI 7G-TRONIC (06 - 09) vs. Audi A8 3.0 TDI clean diesel quattro tiptronic (12 - 13)

€ 91,100
Mercedes S 420 CDI 7G-TRONIC (06 - 09) Mercedes S 420 CDI
€ 74,900
 Audi A8 3.0 TDI clean diesel quattro tiptronic (12 - 13) Audi A8 3.0 TDI clean diesel
€ 91,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 74,900

ⓘ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 3.0 TDI clean diesel.
Mercedes S 420 CDI
Audi A8 3.0 TDI clean diesel
58
Blueprint Mercedes S 420 CDI 7G-TRONIC (06 - 09)
73.7
83.5
57.5
Blueprint Audi A8 3.0 TDI clean diesel quattro tiptronic (12 - 13)
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
Blueprint Mercedes S 420 CDI 7G-TRONIC (06 - 09)
119.5
200
Blueprint Audi A8 3.0 TDI clean diesel quattro tiptronic (12 - 13)
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 3.0 TDI clean diesel
4608 lb
Curb Weight
4222 lb
5820 lb
Gross Vehicle
Weight
5666 lb
Mercedes S 420 CDI 7G-TRONIC (06 - 09)
Weight Difference:
386 lb
8.38 %
Audi A8 3.0 TDI clean diesel quattro tiptronic (12 - 13)

General

Mercedes S 420 CDI
Audi A8 3.0 TDI clean diesel
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 3.0 TDI clean diesel
V8 diesel engine with tur­bo­charger
Engine Type
V6 diesel engine with tur­bo­charger
Mercedes-Benz OM 629
Engine Series
OM 629.911
Engine Code
CDTA, CMHA, CDTC
4
Valves
4
8
Cylinders
6
4 L / 196 cu in
Displacement
3 L / 147 cu in
316 hp
at 3600 rpm
Power
247 hp
at 4000 rpm
Mercedes S 420 CDI
316 hp
247 hp
Audi A8 3.0 TDI clean diesel
538 lb‑ft
at 2200 rpm
Max. Torque
406 lb‑ft
at 1500 rpm
Mercedes S 420 CDI
538 lb‑ft
406 lb‑ft
Audi A8 3.0 TDI clean diesel

Performance

Mercedes S 420 CDI
Audi A8 3.0 TDI clean diesel
155 mph
Maximum Speed
155 mph
6 sec
Acceleration 0 to 62 mph
6.1 sec
62 mph 62
mph

272 ft
0.000 sec

Mercedes S 420 CDI

62 mph 62
mph

279 ft
0.000 sec

Audi A8 3.0 TDI clean diesel

▶ REPLAY
14.58 lb/hp
Weight-to-Power Ratio
17.09 lb/hp
Mercedes S 420 CDI
14.58 lb/hp
17.09 lb/hp
Audi A8 3.0 TDI clean diesel

Fuel Economy / Emissions

Mercedes S 420 CDI
Audi A8 3.0 TDI clean diesel
Fuel Economy
25 mpg
combined
37 mpg
Mercedes S 420 CDI
25 mpg
37 mpg
Audi A8 3.0 TDI clean diesel
18 mpg
city
29 mpg
33 mpg
highway
No data
Kraftstoffanzeige
23.8 gal
Fuel Tank Capacity
23.8 gal
Kraftstoffanzeige
595 mi
Range
874 mi
Mercedes S 420 CDI
595 mi
874 mi
Audi A8 3.0 TDI clean diesel
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).
131.6 kWh
Mercedes S 420 CDI
193.4 kWh
131.6 kWh
Audi A8 3.0 TDI clean diesel
Euro 4 III
Emission Standard
Euro 6b (NEFZ)
398 g/mi (NEFZ)
CO2 Emissions
272 g/mi (NEFZ)

Practical Convenience

Mercedes S 420 CDI
Audi A8 3.0 TDI clean diesel
4
Doors
4
5
No. of Seats
5
1213 lb
Maximum Payload
1444 lb
15.9 cu ft
Trunk Volume
14.4 cu ft
No data
Cargo Volume (Seats Down)
No data