Audi R8 GT: Lighter, Faster, Stronger

Audi R8 GT: Lighter, Faster, Stronger

The R8 high-performance sports car has been a winner from the very beginning. This applies to both the production models, winners of the “World Performance Car” Award in 2008 (R8) and in 2010 (R8 V10), and to the race car, the R8 LMS, which won 23 races in its first season and claimed three championships. The genes of the race version are now coming to the street – in the R8 GT. The exclusive series is limited to 333 units. Each R8 GT has a badge with its production number on the shift lever knob.
Consistent use of lightweight construction: 100 kilograms (220.46 lb) trimmed
The production R8 5.2 FSI quattro is already a shining example of the Audi’s lightweight construction philosophy. Its aluminum Audi Space Frame (ASF) body weighs only 210 kilograms (462.97 lb). The aluminum body panels are joined to the frame of extruded profiles and cast nodes by means of positive and friction connections. The engine frame is made of ultra lightweight magnesium.
The ASF body is largely hand-built at the Neckarsulm plant in a complex manufacturing process. The extremely high strength of the body is the basis for the high-performance sports car’s precise handling, and it also offers good vibration comfort and first-rate crash safety.
Thanks to the ASF body, the production R8 5.2 FSI quattro weighs only 1,625 kilograms (3,582.51 lb) – with quattro permanent all-wheel drive and optional R tronic transmission. This made it all the more difficult for the engineers to once again achieve substantial weight savings. They took an elaborate approach involving every aspect of the vehicle, and in the end the scales came to rest at 1,525 kilograms (3,362.05 lb).
The windshield of the R8 GT is made of thinner glass; the bulkhead between the passenger cell and engine compartment, as well as the window in the rear hatch are made of strong, lightweight polycarbonate. These three modifications saved nine kilograms (19.84 lb). The fixed rear wing is good for an additional 1.2 kilograms (2.65 lb); thinner sheet metal and additional cutouts shaved 2.6 kilograms (5.73 lb) from the aluminum hatch over the 100 liter (3.53 cu ft) luggage compartment at the front of the car.
The long rear hatch is made of carbon fiber-reinforced plastic (CFRP) – an advantage of 6.6 kilograms (14.55 lb). The rear bumper and the sideblades of this same material save an additional 5.2 and 1.5 kilograms (11.46 and 3.31 lb), respectively. With its minimal weight and extremely high strength, CFRP is the ideal material for a high-performance sports car, and Audi has broad-based expertise in its use.
The engineers also fought to shave every possible gram of weight from the technical components of R8. They shaved one kilogram (2.20 lb) from the power brake system, four kilograms (8.82 lb) from the aluminum caps of the brake discs and 9.4 kilograms (20.72 lb) from the battery. The engineers also found 2.3 kilograms (5.07 lb) in the air intake module and 2.8 kilograms (6.17 lb) in the insulation of the engine compartment.
The interior also harbored substantial weight-savings potential. The new, lightweight carpeting accounts for 7.9 kilograms (17.42 lb); the bucket seats with a chassis of glass-reinforced plastic (GRP) account for 31.5 kilograms (69.45 lb). Numerous additional detailed measures targeted the interior, the exterior and the technology, such as higher-grade, lighter steel for the exhaust system’s tailpipes.
Even sharper and more effective: the design
The design of the Audi R8 GT is the expression of concentrated power – a beautiful, technical sculpture measuring 4.43 meters (14.53 ft) long, 1.93 meters (6.33 ft) wide and only 1.24 meters (4.04 ft) high. The exterior underwent numerous modifications that further sharpened the appearance. Many of them also reduce the weight and enhance the aerodynamics. The R8 GT produces even more downforce when driven fast than the production model – without any increase in the Cd value (0.36) or frontal area (1.99 m2) (21.42 sq ft).
The frame of the single-frame grille, its struts and the slats in the air intakes are finished in matt titanium gray; the grille is painted matt black. The splitter under the bumper has a double lip and is made of carbon. Slender, curved flics at the corners of the nose increase the downforce on the front axle and are also made of a carbon fiber composite.
One highlight of the R8 GT are the standard LED headlights, which use light-emitting diodes for all functions. They produce bright, homogeneous light, have a long service life and low energy consumption. The headlights also have an attractive and distinctive appearance. The daytime running lights each comprise 24 LEDs and appear as a continuous band. The reflectors are reminiscent of open mussel shells.
The defining element of the side view are the sideblades, which direct air to the engine and in the R8 GT are also made of matte carbon. The same material is used for the reduced-size housing of the side mirrors, which are mounted on an aluminum base. The 19-inch wheels feature an exclusive five twin-spoke Y design in a titanium-look finish. The front fenders sport “GT” badges.
The modifications to the rear of the car are particularly apparent, beginning with the fixed wing of matte carbon. The ventilation louvers on both sides of the rear hatch and the CFRP bumper, which integrates the large, round tailpipes and vents for the wheel wells, have been redesigned. The larger diffuser is made of carbon fiber composite; the license plate bezel and the wide slats at the rear are in matte titanium gray. The tail lights, which also use LED technology, have dark housings with panes of clear glass.
Audi offers the R8 GT in a choice of four body colors: Samoa Orange metallic, Suzuka Gray metallic, Ice Silver metallic and Phantom Black pearl effect.
Breathtakingly powerful: the 412 kW (560 hp) 5.2 FSI
The modified V10, whose cylinder head covers are painted red, gives the Audi R8 GT breathtaking performance. The R8 GT sprints from a standing start to highway speed in 3.6 seconds, and from zero to 200 km/h (124.27 mph) in 10.8 seconds. And the thrust does not let up until the top speed of 320 km/h (198.84 mph) is reached.
Changes to the engine electronics coaxed an additional 26 kW from the ten-cylinder, which now produces 412 kW (560 hp) from a displacement of 5,204 cc. The torque curve peaks at 540 Nm (398.28 lb-ft) at 6,500 rpm, 10 Nm (7.38 lb-ft) more than in the production version. The V10 has a specific power output of 79.2 kW (107.6 hp) per liter displacement. Its power-to-weight ratio is 3.70 kilograms (8.16 lb) per kW or 2.72 kilograms (6.00 lb) per hp. The engine redlines at 8,700 rpm.
The long-stroke engine (bore x stroke 84.5 x 92.8 millimeters [3.33 x 3.65 in]), which is hand-built at the factory in Györ, Hungary, features a crankcase made of a aluminum-silicon alloy that is both lightweight and very strong. A bedplate – a frame for the crankshaft bearing bridges – further enhances its rigidity. The complete engine weighs only 258 kilograms (568.79 lb). It is characterized by a cylinder angle of 90 degrees and dry-sump lubrication, which uses a highly efficient oil pump module. Both solutions lower the center of gravity and thus improve driving dynamics.
The crankshaft is designed as a common pin shaft. The connecting rods of the opposing pistons engage a common crankpin, resulting in alternating firing intervals of 54 and 90 degrees. This unique rhythm gives the V10 its fascinating sound – a grand, technical music very much like that in racing. Two flaps in the exhaust system modulate its volume and tone as a function of load and engine speed.
The normally aspirated engine consumes an average of 13.7 liters of fuel per 100 km (17.17 US mpg) – very good fuel economy given the tremendous power. The FSI gasoline direct injection system injects the fuel into the combustion chambers at up to 120 bar of pressure. The turbulent mixture cools the cylinder walls, enabling a compression ratio of 12.5:1. A variable intake manifold and the continuous adjustment of the chain-driven camshafts ensure that the combustion chambers are fully filled. Flaps in the intake ports facilitate the formation of the mixture by inducing a tumbling motion in the inflowing air.
The drivetrain: uncompromising traction
Gear changes in the R8 GT are handled by the R tronic sequential manual transmission. The electrohydraulic clutch and switching unit receive their commands electronically. It changes its six gears much faster than a skilled driver could – within a tenth of a second at high load and engine speed.
The electronic management system offers an automatic mode with the Sport and Normal characteristics, and two manual levels. It is controlled using the short gear selector lever on the center tunnel and two paddles on the steering wheel. Maximum thrust when starting is ensured by Launch Control – a program that manages full acceleration with high engine speed and minimum wheel slip when starting.
quattro permanent all-wheel drive is the ideal technology for a high-performance sports car. The central viscous coupling located at the front differential sends 15 percent of the power to the front axle and 85 percent to the rear axle during normal driving. This split harmonizes perfectly with the Audi R8 GT’s 43:57 percent weight distribution. The coupling sends as much as 30 percent of the power to the front wheels within milliseconds, if necessary. A mechanical locking differential at the rear axle further improves traction. It provides up to 25 percent lockup when accelerating and up to 40 percent on the overrun.
Chassis even tauter and more precise
The Audi R8 GT high-performance sports car is a driving machine with breathtaking lateral acceleration and lightning-fast, nearly instantaneous reactions. Its engine is mid-mounted close to the vertical axis; its mass is almost negligible during fast direction changes. The R8 GT is dynamic, precise and stable in almost every situation.
The chassis follows the classic racing design – double wishbones made of aluminum locate the wheels. The hydraulic, power-assisted rack-and-pinion steering has a direct 16.3:1 ratio and connects the driver closely and precisely with the road. A manually adjustable coilover suspension, which lowers the body by as much as 10 millimeters (0.39 in), is standard. Higher front and rear wheel camber rates make the handling a tick more agile than with the standard model.
The 19-inch forged wheels are 8.5 J x 19 up front and 11 J x 19 at the rear, and are shod with size 235/35 and 295/30 tires, respectively. Audi will mount 305/30 tires together with optional wheels on the rear axle upon request. Cup tires, which offer the ultimate in performance on dry roads, are available for racing enthusiasts.
Audi mounts internally ventilated, carbon fiber ceramic brake disks standard. They are extremely durable and abrasion-resistant as well as particularly lightweight. Together they weigh nine kilograms (19.84 lb) less than their steel counterparts of the same size. They measure 380 millimeters (14.96 in) in diameter up front and 356 millimeters (14.02 in) at the rear. The friction rings are bolted to the stainless steel caps via elastic elements. Red anodized aluminum brake calipers – with six pistons up front – are exclusive to the R8 GT.
The ESP stabilization program has been specially tuned to the R8 GT and can be switched into a Sport mode at the push of a button to allow spectacular, but safe, oversteer when accelerating out of a corner. The driver can deactivate the system entirely for a trip to the race track.
Exclusive and dynamic: interior and equipment
At Audi, reducing weight means increasing performance and efficiency, but not sacrifice. The Audi R8 GT, which Audi sells in Germany for €193,000, comes with an automatic climate control system and power windows, a navigation system with MMI operating logic and a powerful sound system. A 465 watt, ten-channel Bang & Olufsen sound system, a CD changer and the Audi Music Interface are available as options. As always with Audi, the interior shows loving attention to detail. Rich materials spoil the occupants with a fine look and feel.
The ergonomic interior is adorned in sporty black and dark gray. The steering wheel, the headliner, the roof posts, the knee pad, the parking brake lever and the bucket seats are covered with Alcantara accented with contrasting stitching. A synthetic sharkskin-look material that feels slightly rough to the touch is applied to the bulkhead, the door liners, the instrument cowl and the dashboard. The “monoposto” – the arch in the cockpit – is made of matt carbon.
The instrument cluster features white dials with “R8 GT” badges. The newly designed selector lever is made of CFRP and aluminum; the center tunnel and the door liners sport decorative inlays in the body color. The door sills feature trims of matt aluminum decorated with the “R8 GT” logo.
A number of exclusive features are available as options for the R8 GT. Exterior options include two alternative wheels, a body-color front splitter and a CFRP engine compartment lining. Carbon elements on the doors, the tunnel, in the cockpit and on the instrument panel are available as interior options. Others include a multifunction leather steering wheel, seat belts in red, orange or gray, floor mats with the “R8 GT” logo and CFRP door sill trims illuminated in red. If desired, Audi will fit seats with carbon frames, which are somewhat lighter than the CFRP shells. The Alcantara seat covers are optionally available with an embroidered “R8 GT” logo.
A race package is available for racing enthusiasts. It includes a bolt-in roll bar in red or black, which has both road and type approval, as well as road-approved four-point belts in red or black, a fire extinguisher and a kill switch for the battery. An optional front bar module for motorsports evens includes a rotary lock for the four-point seatbelt and turns the roll bar into a full cage. Buyers looking for more comfort and convenience can choose cell phone preparation with an innovative belt microphone. Audi also offers a full leather package, control elements in leather with contrasting stitching and a cruise control system as options. The parking aid is included with the standard equipment.

Dacia’s “Duster” Concept Crossover

Dacia’s “Duster” Concept Crossover

Dacia’s first concept crossover – is proud to be different. Seen from the driver’s side, it is visibly a sporting coupé, yet passengers entering from the other side will see it as an Multi Purpose Vehicle with a traditionally opening front door and rear-hinged rear door which suggest plush travelling refinement.  Duster’s height of 1.49 metres, short front and rear overhangs (65cm and 80cm respectively), generous wheelbase (2.80m) and compact volumes (4.25m long, 1.64m wide) exude an overriding sense of robustness and sports appeal.
The front end features a broad bumper with two horizontal air-intake slits that suggest power. The grille features evident Dacia styling cues and is flanked by headlamps which wrap over the front wings to form a tapering line of light that stretches rearward towards the doors.
Viewed from the side, the clear-cut lines of the wheel arches and tall doors reinforce the impression that Duster sits squarely on the road. The Anthracite Grey bodywork and extensive one-piece glazed sweep – made possible by the absence of a central pillar – highlights the styling of the sides which are unmistakably reminiscent of Duster’s graphic identity.
At the rear, the engraved Dacia logo further emphasizes the concept car’s robust, dependable credentials.
Like Logan, Duster is just 4.25 metres long, and its inherent agility ensures that it is perfectly at home in the urban jungle. Meanwhile, its 21-inch, five-spoke aluminium alloy wheels, exterior mirrors positioned on the window surround and trapezoidal aluminium exhaust tailpipes are telltale signs of its sporting pedigree.
Special care has gone into Duster’s aerodynamic efficiency (Cd: 0.30) and the fluid lines of the body sides enable air to flow freely along the vehicle’s flanks before being jettisoned through the rear lights. The aerodynamic, wing-like forms of the roof-mounted direction indicators also channel airflow towards the rear.
The sum of all this work has naturally been beneficial to fuel consumption, and Duster stands out as a particularly environmentally-respectful crossover. Despite its performance potential, the particulate filter-equipped 1.5 dCi 105hp engine (77kW) emits just 139g of CO2/km, equivalent to fuel consumption of 5.3 litres/100km.
This futuristic crossover showcases the brand’s core values – namely simplicity, robustness and authenticity – in a surprising form, yet Dacia’s hallmark ingenuity and generosity are immediately apparent in the way designers have approached Duster’s cabin.
The concept car’s two-tone chocolate and blue interior exudes a sense of well-being and conviviality. The fully glazed roof floods the cabin with light, while the enveloping forms of the staggered slim-line front seats provide first class comfort and support. The driver’s seat is incorporated in a structure which extends all the way from the sill to the centre console, forming a sculptural, one-piece ensemble that echoes the exterior’s sporty appeal.
The user-friendly dashboard features fluid, expressive lines while employing simple materials. The driver’s side front airbag is housed in the lower part of the steeringwheel which has made it possible to position the screen centrally and free up appreciable stowage space on the dashboard. The latter’s receding lines also provide record kneeroom of 280mm for the front passenger who benefits from an exceptionally comfortable seating position. The bellows-like form of the original two-tone dashboard incorporates a 20-litre glovebox, while the door inserts each include eight-litre stowage bins. Another bin has been cleverly concealed in the back of the rear right-hand seat. A simple push causes a box to slide forward from the boot which itself is in total keeping with the Dacia spirit, with the upright tailgate providing a carrying capacity of 470dm3 (VDA), a remarkable achievement for a vehicle of Duster’s compact overall dimensions .

Duster is an adaptable, modular concept car. The four-seat ‘daily driver’ layout can be swiftly converted into a leisure configuration in a matter of seconds. The passenger seat slides underneath the driver’s seat on rails concealed in the floor to leave just one front seat and consequently free up a total carrying volume of two cubic metres. Thanks to a recess in the floor and a strap located under the dashboard, this space can be used to carry a trials mountain bike.