The Comparative Analysis :
Mercedes S 500 7G-TRONIC (05 - 09) vs. Mercedes S 420 CDI long 7G-TRONIC (06 - 09)
€ 95,600
€ 98,900
€ 95,600
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 dimensions of these vehicles differ slightly. Both cars are the same width and height, but the S 500 is 5.1 inches shorter.
S 500
S 420 CDI long
58
73.7
83.5
58
73.7
83.5
73.7 in
Width
73.7 in
83.5 in
Width Incl. Mirrors
83.5 in
58 in
Height
58 in
119.5
200
124.6
205.1
200 in
Length
205.1 in
119.5 in
Wheelbase
124.6 in
Vehicle Weight
S 500
S 420 CDI long
4277 lb
Curb Weight
4718 lb
5611 lb
Gross Vehicle
Weight
Weight
5864 lb
Weight Difference:
441 lb
9.35 %
General
S 500
S 420 CDI long
W221
Generation
W221
Sedan
Car Body Style
Sedan
Mid-Grade Unleaded
Fuel Type
Diesel

Rear-wheel drive
Drivetrain
Rear-wheel drive

7-speed automatic transmission
Transmission
7-speed automatic transmission
Engine
S 500
S 420 CDI long
V8 gasoline engine (naturally aspirated engine)
Engine Type
V8 diesel engine with turbocharger
Mercedes-Benz M 273
Engine Series
Mercedes-Benz OM 629
M 273.961
Engine Code
OM 629.911


4
Valves
4
8
Cylinders
8
5.5 L / 269 cu in
Displacement
4 L / 196 cu in
383 hp
at 6000 rpm
Power
316 hp
at 3600 rpm
S 500
383 hp
316 hp
S 420 CDI long
391 lb‑ft
at 2800 rpm
Max. Torque
538 lb‑ft
at 2200 rpm
S 500
391 lb‑ft
538 lb‑ft
S 420 CDI long
Performance
S 500
S 420 CDI long
155 mph
Maximum Speed
155 mph
5.4 sec
Acceleration 0 to 62 mph
6 sec
62 mph
62
mph
mph
246 ft
0.000 sec
S 500
62 mph
62
mph
mph
272 ft
0.000 sec
S 420 CDI long
▶ REPLAY
11.17 lb/hp
Weight-to-Power Ratio
14.93 lb/hp
S 500
11.17 lb/hp
14.93 lb/hp
S 420 CDI long
Fuel Economy / Emissions
S 500
S 420 CDI long
Fuel Economy
20 mpg
combined
25 mpg
S 500
20 mpg
25 mpg
S 420 CDI long
14 mpg
city
18 mpg
28 mpg
highway
33 mpg
23.8 gal
Fuel Tank Capacity
23.8 gal
478 mi
Range
595 mi
S 500
478 mi
595 mi
S 420 CDI long
Environmental Impact
221.6 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
S 500
221.6 kWh
193.4 kWh
S 420 CDI long
Euro 4 III
Emission Standard
Euro 4 III
449 g/mi (NEFZ)
CO2 Emissions
398 g/mi (NEFZ)
Practical Convenience
S 500
S 420 CDI long
4
Doors
4
5
No. of Seats
5
1334 lb
Maximum Payload
1146 lb
15.9 cu ft
Trunk Volume
15.9 cu ft












No data
Cargo Volume (Seats Down)
No data
















