The Comparative Analysis :

Mercedes S 420 CDI 7G-TRONIC (06 - 09) vs. Audi A8 L 3.0 TFSI quattro tiptronic (10 - 13)

€ 91,100
Mercedes S 420 CDI 7G-TRONIC (06 - 09) Mercedes S 420 CDI
€ 82,300
 Audi A8 L 3.0 TFSI quattro tiptronic (10 - 13) Audi A8 L 3.0 TFSI
€ 91,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 82,300

ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info

Vehicle Dimensions

The Mercedes S 420 CDI is significantly smaller in every dimension. It's 7.4 inches shorter, 3.1 inches narrower and 10.6 inches lower than the Audi A8 L 3.0 TFSI.
Mercedes S 420 CDI
Audi A8 L 3.0 TFSI
58
Blueprint Mercedes S 420 CDI 7G-TRONIC (06 - 09)
73.7
83.5
68.5
Blueprint Audi A8 L 3.0 TFSI quattro tiptronic (10 - 13)
76.7
83.1
73.7 in
Width
76.7 in
83.5 in
Width Incl. Mirrors
83.1 in
58 in
Height
68.5 in
Blueprint Mercedes S 420 CDI 7G-TRONIC (06 - 09)
119.5
200
Blueprint Audi A8 L 3.0 TFSI quattro tiptronic (10 - 13)
122.9
207.4
200 in
Length
207.4 in
119.5 in
Wheelbase
122.9 in

Vehicle Weight

Mercedes S 420 CDI
Audi A8 L 3.0 TFSI
4608 lb
Curb Weight
4310 lb
5820 lb
Gross Vehicle
Weight
5578 lb
Mercedes S 420 CDI 7G-TRONIC (06 - 09)
Weight Difference:
298 lb
6.47 %
Audi A8 L 3.0 TFSI quattro tiptronic (10 - 13)

General

Mercedes S 420 CDI
Audi A8 L 3.0 TFSI
W221
Generation
D4 (4H)
Sedan
Car Body Style
Sedan
Diesel
Fuel Type
Premium Unleaded
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 L 3.0 TFSI
V8 diesel engine with tur­bo­charger
Engine Type
V6 gasoline engine with tur­bo­charger
Mercedes-Benz OM 629
Engine Series
OM 629.911
Engine Code
CGXA, CGWA, CREG
4
Valves
4
8
Cylinders
6
4 L / 196 cu in
Displacement
3 L / 147 cu in
316 hp
at 3600 rpm
Power
286 hp
at 4850 rpm
Mercedes S 420 CDI
316 hp
286 hp
Audi A8 L 3.0 TFSI
538 lb‑ft
at 2200 rpm
Max. Torque
310 lb‑ft
at 2500 rpm
Mercedes S 420 CDI
538 lb‑ft
310 lb‑ft
Audi A8 L 3.0 TFSI

Performance

Mercedes S 420 CDI
Audi A8 L 3.0 TFSI
155 mph
Maximum Speed
155 mph
6 sec
Acceleration 0 to 62 mph
6.2 sec
62 mph 62
mph

272 ft
0.000 sec

Mercedes S 420 CDI

62 mph 62
mph

282 ft
0.000 sec

Audi A8 L 3.0 TFSI

▶ REPLAY
14.58 lb/hp
Weight-to-Power Ratio
15.07 lb/hp
Mercedes S 420 CDI
14.58 lb/hp
15.07 lb/hp
Audi A8 L 3.0 TFSI

Fuel Economy / Emissions

Mercedes S 420 CDI
Audi A8 L 3.0 TFSI
Fuel Economy
25 mpg
combined
27 mpg
Mercedes S 420 CDI
25 mpg
27 mpg
Audi A8 L 3.0 TFSI
18 mpg
city
20 mpg
33 mpg
highway
No data
Kraftstoffanzeige
23.8 gal
Fuel Tank Capacity
23.8 gal
Kraftstoffanzeige
595 mi
Range
636 mi
Mercedes S 420 CDI
595 mi
636 mi
Audi A8 L 3.0 TFSI
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).
166.7 kWh
Mercedes S 420 CDI
193.4 kWh
166.7 kWh
Audi A8 L 3.0 TFSI
Euro 4 III
Emission Standard
Euro 5
398 g/mi (NEFZ)
CO2 Emissions
330 g/mi (NEFZ)

Practical Convenience

Mercedes S 420 CDI
Audi A8 L 3.0 TFSI
4
Doors
4
5
No. of Seats
5
1213 lb
Maximum Payload
1268 lb
15.9 cu ft
Trunk Volume
14.4 cu ft
No data
Cargo Volume (Seats Down)
No data