technical data AUDI A8 2003 D3 / 2.G Technical Features Manual

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Attention
NoteNew
Contents
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Passenger Protection
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Engine, Mechanics
Technical data of V8 4.2 l 5V engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Technical data of V8 3.7 l 5V engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Electrohydraulic torque reaction support . . . . . . . . . . . . . . . . . . . . . . . . . 32
Exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Automatically controlled starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Running Gear
Front axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Rear axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4-level air suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Electric parking brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Adaptive cruise control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Electrical System
Bus topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Convenience and security electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Lighting system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Heating/Air Conditioner
Design and operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Blower unit/air routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Block diagram for front air conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Block diagram for rear air conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
The Self Study Programme contains information on design
features and functions.
The Self Study Programme is not intended as a Workshop
Manual. Values given are only intended to help explain the
subject matter and relate to the software version applicable at
the time of SSP compilation.
Use should always be made of the latest technical publications
when performing maintenance and repair work.

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Engine, Mechanics
200040006000
40
60
80
100
120
140
160
180
200
220
240
260
280 300
320
340 360380 400
420 440
460
Technical data
V8 4.2 l 5V engine
Engine code
letters: BFM
Capacity:
3
Bore: 84.5 mm
Stroke: 93.0 mm
Compression
ratio: 11 : 1
Power: 246 kW (335 hp)
at 6,500 rpm
Torque: 430 Nm at 3,500 rpm
Camshaft
adjustment
range: 22° CS advance
Valves: 5 per cylinder
Engine
management: ME7.1.1
Emission
standard: EU 4
Firing
order: 1 - 5 - 4 - 8 - 6 - 3 - 7 - 2
Capacities: 7.5 l engine oil (incl. filter)
Consumption: Urban: 17.5 - 17.6 l/100 km Non-urban: 8.7 - 8.8 l/100 km
Average: 11.9 - 12.0 l/100 km
Acceleration
0 - 100 km/h: 0 - 80 km/h – 4.8 s 0 - 100 km/h – 6.3 s
Fuel: Premium Plus Unleaded 98/95 RON
CS = Crankshaft
SSP282_002
SSP282_012
Engine speed [rpm]
P
ower [kW]
T
orq ue [Nm]
4,172 cm

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Two different versions are available:
– 420 Nm for the V8 5V 4.2 l or
3.7 l engine and
– 600 Nm for the V8 TDI 4.0 l or
6.0 l W12 engine To satisfy high comfort requirements, the
Audi A8 ´03 features a new 6-speed automatic
gearbox capable of handling a high engine
torque of max. 600 Nm.
Gearbox
Design and operation of the 09E gearbox
are described in SSP 283 (Part 1) and
SSP 284 (Part 2).
SSP282_043
Technical data
Designation: 09E
Factory
designation: AL 600-6Q
ZF
designation: 6HP-26 A61
Type: 6-speed planetary
gearbox, featuring electro-
hydraulic control
with hydrodynamic
torque converter and
slip-controlled lock-
up clutch
Control: Via mechatronic system
(integration of hydraulic
control unit and
electronic control
to form one unit)Max. torque
transmission: 420 Nm for
V8 5V 4.2 l /3.7 l engine
600 Nm for
V8 TDI 4.0 l /W12
6.0 l engine
Front/rear axle
torque distribution: 50/50
Gear oil capacity
(total): 10.4 litres ATF
Gear oil capacity
(replacement): 10 litres ATF
Total weight: approx. 138 kg
(420 Nm version)
approx. 142 kg
(600 Nm version)