Even at first glance, the calibre of the car is plain to see. The Audi R8 sits broad and squat on the road, the strongly accentuated rear end appearing to flex its muscles like a sprinter ready for the off.

The characteristic proportions of the vehicle are dictated by the location of the engine behind the cockpit. This layout is a typical feature of race cars. One of the most striking examples of this design – and as such one of the legitimate antecedents of the Audi R8 – was, and still is, the Auto Union Type C Grand Prix car. The central position of the engine is above all a boon to driving dynamics, as it allows for a weight distribution, as on the R8, of 44 percent to the front and
56 percent to the rear.

The car's body is highly compact in appearance. The front end and the gently curved roof arc are drawn in a sweeping line; a line which immediately marks the two-seater out as an Audi.

The side view also reveals familiar contours. The dynamic line above the wheel arches and the shoulder line interlink the front end, side and rear, imbue the doors and the transition to the side air vent with a strong presence, and even more emphatically highlight the typical Audi rounded wheel housings accommodating the big wheels.

The cabin of the Audi R8 is pushed far forward – a typical feature of a mid-engined sports car, and as such a visual cue linking it to the race car of the same name. Behind the cabin, positioned in front of the rear axle, is the V8 FSI engine, a sculptured piece of engineering visible both through the large, shield-shaped rear window and from inside the car.
 

1.90 metres wide but just 4.43 metres long and 1.25 metres high: these are the proportions of a true sports car. The 2.65-metre wheelbase offers room for the astonishingly spacious cabin and the longitudinally mounted engine behind it. Behind the doors, a large-surface 'sideblade' air deflector sweeps between the wheel arch and the roof section, delivering air for the V8 to breathe as well as for cooling. The paint finish of the sideblades is coordinated with the body colour.

The front end is characterised by the trapezoidal styling of the Audi single-frame grille, flanked on the right and left by additional large-dimensioned air intakes. For the first time, the four-ring badge is positioned on the bonnet, above the grille. The flat strips of the innovative LED headlights, with their clear-glass covers, join flush to the tops of the air intakes.

The R8 is the first series-production car to offer the option of ordering all the headlight functions – dipped beam, main beam, daytime running lights and indicators – as LEDs. LED stands for 'light-emitting diodes', and represents a technology which offers substantial advantages over conventional bulbs based on a much longer life.

Because they take up less space than conventional lights, LEDs provide the designers with greater freedom to be creative. The design of the strikingly three-dimensional main headlights, using LED technology, is particularly eye-catching.

Bionics, in other words drawing design inspiration from nature, has been deployed on the R8's headlights. The light unit has a design reminiscent of an open pine cone. Reflector shells arranged concentrically one behind the other, in conjunction with a powerful LED projection system, concentrate the light from one multi-chip LED, producing a high-luminosity, even form of driving light.

The internal reflectors of the main beam headlight are styled in a shape inspired by the architecture of the Sydney Opera House. And in contrast to them, the daytime running lights delimit the underside of the headlight as narrow strips of light – delivering distinctive signals and providing an innovative visual touch. It will be possible to order LED headlights as options from the end of 2007 onwards.

The interplay of concave and convex lines contours the side-on view of the rear end. Underneath the clearly defined separation edge there is a flat vertical surface framed at its sides by the rear lights – also in LED technology. The third brake light strip runs across virtually the full width of the roof, forming the termination of the transparent engine hood.

The latter feature is yet another visual highlight. The observer looks right onto the V8, the very heart of this sports car. Indirect engine compartment lighting by white LEDs, enabling the engine to be seen even in the dark, is available as an option.

Two large-format diffuser openings in the rear bumper illustrate how intensively the styling of the Audi R8 is dictated by aerodynamics. The two pairs of circular twin exhaust tailpipes each sit at the right and left above the diffuser openings.

An automatically extending rear spoiler is deployed to assist the R8 in using the wind. It provides additional downforce to boost the suction effect produced by the aerodynamic styling of the underbody and by the diffusers. When travelling at lower speeds, the rear spoiler automatically retracts flush with the body.

The full aluminium body is constructed in the Audi Space Frame (ASF) design. Its perfect synthesis of minimal weight and maximum rigidity provides the ideal foundation for optimum driving dynamics, as well as delivering an outstanding power-to-weight ratio of just 3.71 kg per bhp.