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Mercedes Benz W221 Class S 420 CDI
Mercedes Benz W221 Class S 420 CDI (2006)
Audi A8 (D3) 4.2 TDI V8 Quattro
Audi A8 (D3) 4.2 TDI V8 Quattro (2005)
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Engine Technical Data
Engine type - Number of cylinders
V 8
V 8
Fuel type
Diesel
Diesel
Fuel System
Common Rail
Common Rail
Engine Alignment
Longitudinal
Longitudinal
Engine Position
Front
Engine displacement
243.9 cu-in / 3996 cm3
252.3 cu-in / 4134 cm3
Bore
3.27 inches
83.0 mm
3.27 inches
83 mm
Stroke
3.62 inches
92.0 mm
3.76 inches
95.5 mm
Number of valves
32
32
Aspiration
TGV + Intercooler
TGV + Intercooler
Compression Ratio
17.7
16.5
Horsepower
316 HP / 320 PS / 235 kW @ 3600 rpm
322 HP / 326 PS / 240 kW @ 3500 rpm
Maximum torque
538 lb-ft / 730 Nm @ 2200 rpm
479 lb-ft / 650 Nm @ 1600 rpm
Drive wheels - Traction - Drivetrain
RWD
AWD
Transmission Gearbox - Number of speeds
7
6
Clutch Type
Automatic
Automatic
Size, Dimensions, Aerodynamics and Weight
Body
Sedan
Num. of Doors
4
4
Num. of Seats
5
5
Wheelbase
119.49 inches / 303.5 cm
115.91 inches / 294.4 cm
Length
199.84 inches / 507.6 cm
199.29 inches / 506.2 cm
Width
73.66 inches / 187.1 cm
74.57 inches / 189.4 cm
Height
57.99 inches / 147.3 cm
56.85 inches / 144.4 cm
Aerodynamic drag coefficient - Cx
0.27
0.27
Front Brakes - Disc dimensions
Vented Discs
Vented Discs
Rear Brakes - Disc dimensions
Discs
Vented Discs
Front Tyres - Rims dimensions
235/55 R17
235/55 R17
Rear Tyres - Rims dimensions
235/55 R17
235/55 R17
Curb Weight
4387 lbs / 1990 kg
4288 lbs / 1945 kg
Weight/Power Output Ratio
6.22 Kg/hp
5.97 Kg/hp
Trunk / Boot capacity
19.8 cu-ft / 560 L
17.7 cu-ft / 500 L
Top Speed
155 Mph / 250 km/h
155 Mph / 250 km/h
Acceleration 0 to 100 km/h (0 to 62 mph)
6.0 s
5.9 s
Fuel Consumption (Economy), Emissions and Range
Fuel Consumption - Economy - City NEDC
18 MPG
13 L/100 km
22 MPG UK
18 MPG
13.3 L/100 km
21 MPG UK
Fuel Consumption - Economy - Open road NEDC
33 MPG
7.2 L/100 km
39 MPG UK
33 MPG
7.2 L/100 km
39 MPG UK
Fuel Consumption - Economy - Combined NEDC
25 MPG
9.4 L/100 km
30 MPG UK
25 MPG
9.4 L/100 km
30 MPG UK
Fuel Tank Capacity
23.8 gallons
90 L
19.8 UK gallons
23.8 gallons
90 L
19.8 UK gallons
CO2 emissions
247 g/Km (Mercedes Benz)
254 g/Km (Audi)



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