The name remains unchanged but the technology is completely new

In the 2014 season, Audi is aiming to achieve the hat-trick in the FIA World Endurance Championship (WEC) and another success in the Le Mans 24 Hours with a Le Mans prototype that has been redeveloped from scratch, combined with technical innovations Audi is renowned for. 
 
In the new Technical Regulations, a large number of principal definitions, which concern the powertrain, body dimensions, safety and aerodynamics, were re-determined.

The refined V6 TDI unit makes a crucial contribution to the car's compliance with the energy specifications of the regulations. The new R18 has to do with up to 30 percent less fuel than its immediate predecessor. 
 
In addition to the internal combustion engine, the powertrain features the integration of two hybrid systems. A Motor-Generator-Unit (MGU), recovers kinetic energy at the front axle during braking while a turbocharger is linked to an electrical machine, which makes it possible to convert the thermal energy of the exhaust gas flow into electric energy.

The 100mm slimmer body reduces aerodynamic drag but is contrasted by other innovations that do not provide any advantages in aerodynamics. At 1,050mm, the race car has to be 20mm taller but the lower overall width of the car results in a slimmer underfloor.

A genuine front wing with a flap promises aerodynamic advantages and lower costs, as this part of the bodywork will lend itself to easier modification to suit the various race tracks. On the other hand, greater limits have been imposed on the aerodynamic design freedoms at the rear end like the exhaust blown rear diffusors.

The rule-makers have continued to improve the safety of the latest race car generation by imposing numerous discrete requirements. 

The new monocoque has to resist higher loads and is reinforced by additional layers of fabric, which are hard to penetrate in the case of a concentrated impact.

For the first time, wheel tethers are prescribed. They connect the outer assemblies of the front wheel suspensions with the monocoque and the ones of the rear suspensions with the chassis structure. Another new feature is a CFRP structure behind the transmission which absorbs energy in a collision.

Audi is setting its sights on continuing to maintain the leading role it has enjoyed in sports prototype racing since 2000 and on again demonstrating 'Vorsprung durch Technik' at Le Mans.