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