Audi has just released official info on their latest R8 supercar. Badged the Audi R8 GT the car is limited to 333 examples and boasts an enhanced 5.2 litre V10 engine producing 412kW (560hp). With 100kg of weight stripped from it, the R8 GT, with standard R tronic transmission, can accelerate to 100km/h in 3.6 seconds.
Those numbers represent an improvement of 26kW and 0.3 seconds over the regular R8 V10. Other differences include a revised body kit, first seen in last week’s spy shots. You can pick it by the carbon fibre front splitter and rear diffuser. Also note the aluminium side mirror mounts and fixed rear wing. The side “flicks”on the outer front wings also give the game away, while helping to increase the GT’s downforce. Revised LED daytime running lights, now form a constant strip of light, also indicate this is a more special R8.
Weight reduction of the R8 GT was achieved in obvious areas such as lighter seats and battery, resulting in a combined saving of 40kg. Use of a thinner glass windscreen and polycarbonate elsewhere yielded a net loss of 9kg. Carbon fibre reinforced plastic body panels also saved over 13kg of precious weight. The level of detail sought is impressive, though. For example, careful selection and trimming of materials for the carpets, insulation, the air intake, the braking system, the fixed rear wing and more contributed to the GT’s diet. Over 2.5kg was saved through the use of thinner sheet metal with addition cutouts, as well.
Given those weight savings it is surprising, perhaps, that few luxuries have been lost inside the cabin. Climate control and power windows you can probably excuse. But a standard navigation system and 465 watt Bang & Olufsen stereo seem a little counter-productive. The alcantara covered steering wheel is a nice touch, though. Its a shame the same can’t be said for the white dials.
The quattro all-wheel drive system sends 85 per cent of the car’s power to the rear wheels under normal driving conditions. The car’s 43:57 weight distribution and tweaks to its ESP parameters allows “spectacular, but safe, oversteer when accelerating our of a corner”. That’s what we like to see.
Wheels are 19″ in size and made from forged alloy. Up front they are 8.5″ wide, while 11″ at the back should help in getting all that power down. Carbon fibre ceramic brakes are standard in the GT, set off nicely by red anodised six pot calipers under the front wheels.
Die hard track day warriors can also option a bolt in roll cage and a four-point harness system to keep them in place.
Available in just four coloursâ€”Samoa Orange metallic, Suzuka Gray metallic, Ice Silver metallic and Phantom Black pearl effectâ€”you can secure an R8 GT in Germany for the tidy sum of â‚¬193,000 (approx AU$280K). If the R8 GT does find its way down under, expect to pay almost double that. But, if you could, you would. Wouldn’t you?
More pics and Audi’s press release after the break.
The Audi R8 GT: Extreme lightweight construction and tremendous performance
- Limited-production, top-of-the-line version of the high-performance sports car
- 100 kilograms lighter, body parts in carbon
- V10 FSI with 412 kW (560 hp), 0 â€“ 100 km/h in 3.6 seconds
Now even more powerful, lighter and faster: Audi presents a limited-production version of it R8 high-performance sports car, the R8 GT. The output of its 5.2-liter V10 has been increased to 412 kW (560 hp); vehicle weight has been reduced by roughly 100 kilograms (220.46 lb). The R8 GT accelerates from zero to 100 km/h (62.14 mph) in 3.6 seconds and reaches a top speed of 320 km/h (198.84 mph).
The R8 high-performance sports car has been a winner from the very beginning. This applies to both the production models, winners of the â€œWorld Performance Carâ€ 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 â€“ 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 Audiâ€™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 carâ€™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) â€“ 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) â€“ 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 systemâ€™s tailpipes.
Even sharper and more effective: the design
The design of the Audi R8 GT is the expression of concentrated power â€“ 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 â€“ 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 flicks 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 â€œGTâ€ 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 GyÃ¶r, Hungary, features a crankcase made of a aluminum-silicon alloy that is both lightweight and very strong. A bedplate â€“ a frame for the crankshaft bearing bridges â€“ 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 â€“ 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) â€“ 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 â€“ 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 â€“ 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 GTâ€™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 â€“ 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 â€“ with six pistons up front â€“ 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 â‚¬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 â€œmonopostoâ€ â€“ the arch in the cockpit â€“ is made of matt carbon.
The instrument cluster features white dials with â€œR8 GTâ€ 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 â€œR8 GTâ€ 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 â€œR8 GTâ€ 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 â€œR8 GTâ€ 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.