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Design

Brawny, compact, powerful: The appearance of the Audi quattro concept makes no secret of its potential. Although the genes of the elegant Audi A5 and RS 5 Coup├ęs are impossible to overlook, the appearance of the show car is far more aggressive and extroverted. Even the obvious differences between the base model and the evolution are more dramatic than between the Ur-quattro and the Sport quattro in 1984.

The concept car’s wheelbase is 150 millimeters (5.91 in) shorter than that of the RS 5. The primary reason for this, of course, was to enhance agility and reduce weight – form follows function.

In contrast to Sport quattro, the Audi designers also shortened the rear overhang by a total of 200 millimeters (7.87 in) to maintain the harmony of the basic proportions. Roof height was reduced by 40 millimeters (1.57 in) for this same reason.

With its exterior dimensions (length x width x height) of 4.28 m (14.04 ft) x 1.86 m (6.10 ft) x 1.33 m (4.36 ft) and wheelbase of 2.60 m (8.53 ft), the Audi quattro concept fits neatly into the sports car segment.

The low roof also reduces the height of the greenhouse and thus lowers the vehicle’s visual center of gravity. The muscular C-pillar is clearly an homage to the design of the Ur-quattro. As with that model, the trademark four rings can be found at the transition to the side of the vehicle, but in this case they are stamped into the sheet metal. Together with the large center-locking, 20-inch wheels in a 7-twin-spoke design, the lines make for extremely dynamic and powerful proportions when viewed from the side.

The wheel wells in the arched fenders are prominently flared – another quote from the design language of the Sport quattro. The same applies to the distinctive air outlet on the right side of the hood, which allows the five-cylinder engine to breathe more freely.

A significant feature of the front end is the stark single-frame grille. The elimination of the chrome frame lends it a functional and technical character. Large, upright air intakes at the corners of the bumper underscore the performance of the power plant.

The top of the grille merges into the flat strips of the headlight modules with their clear glass covers. All light units use ultra-efficient LED technology. The LED elements change their appearance between a horizontal and a vertical arrangement and thus change the character of the front end of the vehicle depending on the lighting function activated.

The strongly molded front skirt includes integrated carbon elements. This lightweight, yet extremely strong material is also used for the rear hatch and the hood, which are unpainted on the inside in order to use the visual quality of the material as a design element. The large spoiler integrated into the rear hatch is also made of carbon and extends automatically as needed and can be adjusted for maximum downforce.


Infotainment

Entertainment is offered not just under the hood, but also in the form of digital media. A customizable web radio can use the driver’s cellular phone to connect to digital radio stations all over the world, if desired, for a sheer endless array of genres and musical styles. Playback of the driver’s own files and playlists is also supported.

Communication also benefits from access to corresponding online services. Whether the online address book or the driver’s own cellular phone, the MMI combines all data into a single view. Contacts are always available wherever the user happens to be.

To pay proper respect to the Ur-quattro as the winner of numerous rally world championships, a so-called “prayer book” – the classic rally copilot's track description – can be displayed in racing mode. It provides precise information about the route ahead for an authentic rally feeling – even if a copilot is not available.


Engines and transmissions

The allure of the five-cylinder engine

High-performance five-cylinder gasoline engines enjoy a long tradition at Audi, powering cars like the Ur-quattro to the head of the pack. Audi resurrected this line back to life in 2009 with the 340 hp, turbocharged FSI engine in the TT RS. The further developed engine in the Audi quattro concept extracts even more potential from this new, state-of-the-art five-cylinder foundation.

Numerous tweaks resulted in a substantial power increase to 408 hp, and its 480 Newton meters (354.03 lb-ft) of torque also leave the base version far behind.

Its basic concept makes an Audi five-cylinder an unusual engine. It has a firing interval of 144 degrees and a firing order of 1-2-4-5-3, alternately between directly adjacent cylinders and cylinders that are far apart.

This produces the distinctive rhythm and musical sound, which are also the result of the intake and exhaust geometry. A specially designed torsional vibration damper at the front end of the crankshaft compensates for the free moments of the engine.

Turbocharged gasoline engines are a traditional Audi domain, and the five-cylinder turbo in the Audi quattro concept is also a high-performance engine. Displacing 2,480 cubic centimeters, it produces 300 kW (408 hp) between 5,400 and 6,500 rpm. Peak torque of 480 Nm (354.03 lb ft) is already available at 1,600 and remains constant through 5,300 rpm. The powerful unit accelerates the Audi quattro concept from 0 to 100 km/h (62.14 mph) in just 3.9 seconds.

The 2.5 liter TFSI is extremely compact. Its cylinder spacing measures 88 millimeters (3.46 in); the external main bearings were moved inside. Only 494 millimeters (19.45 in) long, the long-stroke engine (bore x stroke 82.5 x 92.8 millimeters [3.25 x 3.65 in]) is suitable not only for transverse installation in the TT RS, but also for longitudinal installation in the emphatically short front end of the Audi quattro concept.

Its low weight of only 183 kilograms (403.45 lb) is also a record. It helps keep the total weight of the show car low and also offers significant advantages for the distribution of axle loads and thus for the car’s handling.

The 408-hp five-cylinder engine is surprisingly frugal, requiring an average of just 8.5 liters/100 km (27.67 US mpg). Its high efficiency can be attributed to the combination of FSI direct fuel injection and turbocharging, two Audi core technologies. This TFSI pairing harmonizes perfectly in motorsports, the world’s most demanding test lab: It has powered the R8 race car to five victories in the 24 Hours of Le Mans and 63 victories in 80 other races.












[Source: Audi Press]

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