The Comparative Analysis :
Audi A8 L 55 TFSI quattro tiptronic (17 - ..) vs. Mercedes S 420 CDI long 7G-TRONIC (06 - 09)
€ 98,700
€ 98,900
€ 98,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 98,900
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The Audi A8 L 55 TFSI is slightly bigger in every dimension. It's 3.6 inches longer, 2.9 inches wider and 0.5 inches taller than the Mercedes S 420 CDI long.
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
58.5
76.6
83.9
58
73.7
83.5
76.6 in
Width
73.7 in
83.9 in
Width Incl. Mirrors
83.5 in
58.5 in
Height
58 in
123.1
208.7
124.6
205.1
208.7 in
Length
205.1 in
123.1 in
Wheelbase
124.6 in
Vehicle Weight
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
4475 lb
Curb Weight
4718 lb
6074 lb
Gross Vehicle
Weight
Weight
5864 lb
Weight Difference:
243 lb
5.15 %
General
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
D5 (4N)
Generation
W221
Sedan
Car Body Style
Sedan
Mid-Grade Unleaded
Fuel Type
Diesel
Permanent all-wheel drive (AWD)
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
7-speed automatic transmission
Engine
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
6-cylinder mild hybrid gasoline engine with turbocharger
Engine Type
V8 diesel engine with turbocharger
Engine Series
Mercedes-Benz OM 629
CZSE
Engine Code
OM 629.911
4
Valves
4
6
Cylinders
8
3 L / 147 cu in
Displacement
4 L / 196 cu in
335 hp
at 5000 rpm
Power
316 hp
at 3600 rpm
Audi A8 L 55 TFSI
335 hp
316 hp
Mercedes S 420 CDI long
369 lb‑ft
at 1370 rpm
Max. Torque
538 lb‑ft
at 2200 rpm
Audi A8 L 55 TFSI
369 lb‑ft
538 lb‑ft
Mercedes S 420 CDI long
Performance
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
155 mph
Maximum Speed
155 mph
5.7 sec
Acceleration 0 to 62 mph
6 sec
62 mph
62
mph
mph
259 ft
0.000 sec
Audi A8 L 55 TFSI
62 mph
62
mph
mph
272 ft
0.000 sec
Mercedes S 420 CDI long
▶ REPLAY
13.36 lb/hp
Weight-to-Power Ratio
14.93 lb/hp
Audi A8 L 55 TFSI
13.36 lb/hp
14.93 lb/hp
Mercedes S 420 CDI long
Fuel Economy / Emissions
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
Fuel Economy
30 mpg
combined
25 mpg
Audi A8 L 55 TFSI
30 mpg
25 mpg
Mercedes S 420 CDI long
22 mpg
city
18 mpg
No data
highway
33 mpg
19 gal
Fuel Tank Capacity
23.8 gal
574 mi
Range
595 mi
Audi A8 L 55 TFSI
574 mi
595 mi
Mercedes S 420 CDI long
Environmental Impact
147.7 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 L 55 TFSI
147.7 kWh
193.4 kWh
Mercedes S 420 CDI long
Euro 6d-TEMP (WLTP)
Emission Standard
Euro 4 III
348 g/mi (WLTP)
CO2 Emissions
398 g/mi (NEFZ)
Practical Convenience
Audi A8 L 55 TFSI
Mercedes S 420 CDI long
4
Doors
4
5
No. of Seats
5
1598 lb
Maximum Payload
1146 lb
14.3 cu ft
Trunk Volume
15.9 cu ft
No data
Cargo Volume (Seats Down)
No data
