Common rail fuel injection: uniform high pressure fuel supply to all eight cylinders
With the new V8 engine (with four valves per cylinder) installed in the A8 3.3 TDI quattro, the first eight-cylinder direct-injection engine which complies with the stringent EU III exhaust emission limits, Audi is establishing a further landmark in the history of passenger-car direct-injection diesels. Common-rail injection, a water-cooled charge-air intercooler, four valves per cylinder and two turbochargers with variable turbine geometry are the principal technical features. With torque of 480 newton-metres available all the way from engine speeds of 1800 to 3000 rpm, and a power output of 165 kW (225 bhp), the A8 3.3 TDI quattro is the flagship of the Audi TDI model programme.
As well as the excellent performance, the car's low noise levels are a notable feature. Over the entire engine-speed range, the new V8 TDI matches the quality achieved by an eight-cylinder spark-ignition engine.
With a total fuel consumption of approx. 9.7 litres per 100 kilometres according to the 93/116/EC test method, the car's average operating range before refuelling is some 930 kilometres - a peak value for a car in the top automobile league.
Spontaneous response to accelerator movement and an impressive 0 to 100 km/h time of only 8.2 seconds make this car, which with its top speed of 242 km/h would normally be regarded as a "long-distance runner", into a most impressive sprinter as well.
10 Years of Audi TDI Technology (Intro)
Outlook: Audi A8 3.3 TDI quattro
Outlook: Audi A6/A6 Avant 2.5 TDI
Outlook: Audi A4 1.9 TDI
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