Specifications

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26 Audi ultra
Audi ultra on the podium: the Audi R18 TDI
Audi ultra, the pioneering lightweight technology
from Audi, is more than just the sum of its
individual components. It combines innovative
materials, intelligent design principles and
production processes that use resources
sparingly into an overall concept. Many Audi
ultra lightweight measures have already been
implemented in the Audi RS 4 Avant.
That starts with the body itself. The steel shell
design of the Audi RS 4 combines low weight
with high rigidity. The tailor-made floor pan is
made using different material thicknesses and
qualities. The design uses only as much material
as necessary in the respectively right places to
achieve the best result. Thin metal panels made
of hot- and cold-formed steel make up the body.
The aluminium components on the front and rear
axles as well as the lightweight forged aluminium
wheels consistently implement this lightweight
theme. New innovative wave brake discs with a
wave-shaped contour and aluminium brake disc
chambers specifically reduce the weight on the
wheels. The resulting reduction in unsprung
masses leads to improved rolling characteristics.
The self-locking crown gear centre differential
is smaller and lighter than the previous
version used. Yet another convincing example
of Audi ultra.
Each lightweight component has an effect on
other components, allowing their dimensions
to be reduced as well. The result is a continuous
development process towards less and less
weight and more and more efficiency. In figures:
a vehicle that weighs 100 kg less can save up
to 0.3 litres of fuel per 100 km.
The fuel consumption and CO₂ emission figures can be found on page 60.
Audi ultra:
Every gram less extends the lead.
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