Audi R8 V105.2 FSI
By Mike Hanlon
15:39 January 11, 2009 PST

Audi R8 V105.2 FSI
Image Gallery (24 images)For maximum dynamics: low center of gravity engine
The technical refinements of the long-stroke ten-cylinder engine include dry sump lubrication, which allows the engine to be mounted low within the chassis. The wide cylinder angle of 90 degrees also makes for a low center of gravity. The crankcase is a high-strength aluminum-alloy casting produced in a complex process. The connecting rods are made of forged steel, the pistons of aluminum. The four camshafts are chain-driven and each is adjustable through 42 degrees. This provides great latitude in controlling the valve timing. In combination with the straight, flow-optimized ducts of the intake manifold, this improves the charge throughout the entire speed range. The R8 5.2 FSI quattro has a six-speed transmission. A precise and smooth-shifting manual transmission comes as standard equipment. The sequential R tronic is available as an option. The high-tech gearshift conveys an authentic racing feel – with the rocker switches at the steering wheel and the short shifting times of usually less than one-tenth of a second. When the driver actuates the Launch Control program by pressing a button, the R8 V10 takes off in a vehement quick-start with electronically controlled tire slip – both with the R tronic and with the manual transmission.
A contributing factor to the wide lead in traction and driving safety of the Audi R8 V10 over the competition is quattro all-wheel drive – it’s the superior technology especially for a high-performance sports car. Four powered wheels get more grip than two. They enable the driver to step on the gas sooner when coming out of a curve. It’s not only the traction that benefits, but also the transverse dynamics and the stability.
44 to 56 percent – the ideal axle load distribution
The Audi R8 chassis offers both dynamic performance and astonishing levels of comfort on long distances. This high-performance sports car from Audi eagerly responds to any steering action with instant ease, achieves lateral acceleration of up to 1.2 g, and handles any situation with superb driving safety. Its mid-engine design provides an ideal axle load distribution of 44 to 56 percent.
The wheel suspensions on dual aluminum wishbones front and rear – a classic racing technology – are optimized for neutral self-steering characteristics. Even more than in the eight-cylinder R8, this setup is designed for maximum performance. 19-inch wheels equipped with tire pressure monitoring display are standard equipment. Their 10-spoke Y design is exclusive to the R8 V10. Tire sizes are 235/35 front and 295/30 rear.
The car features a high-end damper technology as standard: Audi magnetic ride adapts the characteristics of the suspension in milliseconds to the nature of the road surface and to the driving style. Suspended in the oil of the shock absorbers are tiny magnetic particles which, when a voltage is applied, rearrange themselves so as to slow down the flow of oil through the valves.
In the R8 V10, deceleration is provided by an extremely muscular braking system – eight brake pistons at the front and four at the rear grasp the brake disks, which are ventilated and perforated to ensure unimpeded heat transfer. The brake disks on the front axle have a diameter of 380 millimeters (15 in); the rear discs span 356 millimeters (14 in).
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Keith Lawhorn
- November 11, 2009 @ 03:07 UTC