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All A5 petrol engines feature FSI
®
direct-injection – a unique Audi technology
originally developed for the Le Mans 24-hour endurance race to deliver
increased power and torque as well as enhanced fuel efficiency. The way it does
this is, in theory, very simple. Precisely the right amount of fuel and air are
injected directly into the combustion chambers, enabling the engine to ‘breathe’
more easily. At the same time, electronics monitor the engine load and adjust
the injection process. The result – reduced heat-loss and increased output, with
around a 15% reduction in fuel consumption and significantly lower exhaust
emissions. Ideal for the buyer who wants an athletic, exhilarating drive without
the drawbacks of excessive fuel costs or high emissions.
All diesel engines from Audi are known as TDI
®
. This impressive technology
was originally pioneered by Audi in 1989, marking a departure from the noisy,
fuel-thirsty diesel engines of the past. Like its FSI
®
petrol counterpart, the TDI
®
diesel engine is designed for power, performance, low fuel consumption and
reduced emissions.
The A5’s TDI
®
engines are based on the common rail system. Here, fuel is stored
and kept at constant pressures of up to 1, 600 bar, ready to feed a series of
highly accurate piezo injectors, which control the rate and point of injection.
Petrol Diesel
Engines
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