Specifications

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24 Audi ultra
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 just the right amount
of material needed in just the 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. Innovative wave brake disc
chambers 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.
Audi ultra on the podium: the Audi R18 ultra
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