Audi has revived the quattro name for its new hybrid Le Mans 24 Hours challenger.
The hybrid version of the German manufacturer's turbodiesel LMP1 coupe will be known as the R18 e-tron quattro.
It takes the name because its hybrid systems recover kinetic energy and return it to the track through the front axle.
It`s the world's first to have a diesel-electric hybrid system that mates the car's usual TDI engine out back powering
the rear wheels with electric motors up front to power the front wheels.

The R18 e-tron quattro follows in a line of successful Audi four-wheel-drive competition cars from the original Audi Quattro
World Rally Championship winner of the early 1980s to its A4 quattro Super Tourer of the late 1990s.
The car was unveiled in Munich on Wednesday evening together with the conventional 2012-spec version, which has been
christened the R18 ultra.
Audi Sport boss Wolfgang Ullrich said: "To develop hybrid technology for Le Mans is at least as ambitious and challenging as
our diesel project was in the early stages. The first results are very encouraging and we are intrigued to see just how this
technology performs."

The R18 e-tron, which will also race in the new FIA World Endurance Championship, becomes a four-wheel-drive car within
certain limits laid down in the Le Mans rulebook. The regulations allow 500kJ (approximately 70bhp) of stored energy to be
transfered to the wheels between two braking 'events' at speeds above 120km/h (75mph).
The rules allow energy retrieval on only one axle. The advantages of choosing the front wheels include improved traction and
greater efficiency during the recovery process.

Audi has chosen to use a flywheel or accumulator for energy storage rather than batteries or the super-capacitors favoured
by rival Toyota.
Christopher Reinke, Audi Sport's technical project leader LMP, said: "A high power density is crucial during energy
recuperation. The accumulator must be capable of absorbing and lot of energy within a few seconds during the braking stage."
The flywheel has been developed by Williams Hybrid Power, which also produced the unit in sister marque Porsche's 911 GT3-R
Hybrid.

The 2012 Audis will not race until the second round of the WEC at Spa in May. A revised version of last year's R18 TDI will be
used in the Sebring 12 Hours series opener on March 17 when the German manufacturer enters three cars.
Audi will run its full four-car Le Mans line-up of two R18 e-tron quattros and two R18 ultras (basically a lighter winner car from
last year) at Spa. It will run one of each at each WEC round after the 24 Hours.

So, let the fight between Toyota and Audi in Le Mans begin!