Sunday, July 24, 2011

2012 The Audi R8 GT Spyder delivers breathtaking performance

The Audi ultra lightweight technology is the key to the R8 GT Spyder’s weight of just 1,640 kilograms (3,615.58 lb). That’s 85 kilograms (187.39 lb) less than its technical basis, the R8 Spyder 5.2 FSI quattro. The Audi Space Frame (ASF) body, consisting of cast nodes, extruded sections and aluminum panels, accounts for just 214 kilograms (471.79 lb) of the total weight. The body is assembled predominantly by hand in the R8 workshop at the Neckarsulm plant. Final assembly of the car takes place in the same way.

The engine frame is made of ultra-light magnesium; the long cover over the soft-top compartment and the large side panels at the rear are made of carbon fiber-reinforced polymer (CFRP). CFRP is also used for the modified front spoiler, the fixed rear spoiler and the new rear bumper. Together, these components provide a weight saving of 5.5 kilograms (12.13 lb).
Visual modifications accentuate the styling of the R8 GT Spyder. These include add-on parts in contrasting titanium gray, a front splitter with a dual lip, flics at the sides of the front bumper, red GT badges, round exhaust tailpipes, an enlarged diffuser and dark LED tail lights in a clear-glass design. Audi offers an optional windshield frame in matt CFRP.

Audi engineers also trimmed weight from the technical components in the area of the transmission, wheels and brakes. In the interior, the bucket seats alone, with their chassis of glass fiber-reinforced polymer (GFRP), saved 31.5 kilograms (69.45 lb) of weight.
Prodigious power: the drivetrain
The performance offered by the new top-of-the-line model in the R8 family is formidable. The 5.2-liter V10 with an aluminum crankcase draws its fuel from an FSI direct injection system. Dry-sump lubrication ensures a reliable supply of oil even under maximum lateral or straight-line acceleration.

With its modified electronic management, the long-stroke engine produces 540 Nm (398.28 lb-ft) of torque at 6,500 rpm, and its peak output is 412 kW (560 hp). Each unit of horsepower has only 2.93 kilograms (6.46 lb) to move. The R8 GT Spyder catapults from zero to 100 km/h (62.14 mph) in 3.8 seconds and reaches a top speed of 317 km/h (196.97 mph). In every situation, the engine impresses with its thrust and bite – and that unmistakable sound of an Audi ten-cylinder.
The R8 GT Spyder comes standard with an automated six-speed R tronic transmission with two fully automatic modes. In the additional manual mode, the driver can shift gears using the paddles on the steering wheel or by flicking the joystick. At high load and revs, gear changes take only one-tenth of a second. The launch control program manages the starting sprint with high engine speed and precision-control of the tire slip.

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