Technical Specifications
2003 Audi A8
ENGINE:
Type DOHC aluminum alloy 90 degree V8, LEV exhaust standard
Arrangement Front mounted, longitudinal
4.2 liter
Bore 3.32 in. 84.5 mm
Stroke 3.66 in. 93.0 mm
Displacement 255 cu. in. 4172 cc
Compression ratio 10.8 : 1
Fuel requirement Premium unleaded (91 AKI) recommended for maximum performance
Horsepower (SAE) 310 hp @ 6200 rpm
Max. Torque 302 lbs. ft. @ 3000 - 4000 rpm
ENGINE DESIGN:
Cylinder block Aluminum alloy
Crankshaft Forged steel, 5 main bearings
Cylinder head Aluminum alloy
Valve train / intake DOHC, belt driven, hydraulic lifters / 3 path variable intake manifold roller camshaft followers, variable intake camshaft timing
Firing order 1 - 5 - 4 - 8 - 6 - 3 - 7 - 2
Cooling system Water-cooled, thermostatically controlled radiator fan
Lubrication system Gear pump, pressurized, full flow with oil cooler
Fuel injection / ME 7.0 Motronic with electronic multi-point sequential fuel injection, hot film air mass sensor, solid state direct ignition
Ignition system with multiple coils, dual knock sensors with cylinder selective knock control and fully adaptive controls, electronic throttle control
Emission system Dual 3-way catalytic converters with individual (four) oxygen sensors
ELECTRICAL SYSTEM:
Battery 12 volts 92 amp/hr
Alternator 14 volts 150 amp
DRIVETRAIN:
Transmission Electronically controlled five-speed automatic with Tiptronic®, dynamic shift program (DSP) and hill detection capability,
lock-up torque converter and automatic shift lock
Type quattro®
Automatic
Gear ratios: 1st
2nd
3rd
4th
5th
Reverse
Final Drive
Front Differential Hypoid gear, electronically locking (EDL)
Center Differential TORSEN® (TORque SENsing) differential providing
automatic and variable front to rear power proportioning
Rear Differential Hypoid gear, electronically locking (EDL)
STEERING:
Type Rack and pinion, Servotronic® - vehicle speed variable power assist
Ratio 15.7 : 1
Turns (lock-to-lock) 2.7
Turning circle (curb-to-curb) 40.2 ft. 41.7 ft.
SUSPENSION:
Front Four link with upper and lower control arms, stabilizer bar, coil spring/shock absorber struts (gas charged)
Rear
Trapezoidal link with track-rod, anti-roll, coil spring/shock absorber struts (gas charged)
0.804 : 1
4.095 : 1
2.909 : 1
A8
12.25 m
3.571 : 1
2.200 : 1
1.505 : 1
1.000 : 1
A8 L
12.7 m
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