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    By admin


    March 3, 2009


    Source: Audi AG



    The Audi TT RS: A Pure Driving Machine developing 340 bhp
    Audi is once again producing a five-cylinder engine – and a very special one
    at that. Arriving at dealerships this summer (Germany), the TT RS has a
    turbocharged 2.5-liter engine with direct gasoline injection; it produces 250
    kW (340 bhp) and 450 Nm (331.90 lb.-ft.) of torque. The blazing five-cylinder
    engine enables the TT RS to perform extraordinary feats. In conjunction
    with quattro permanent all-wheel drive and a high-performance chassis, the
    engine makes the compact Audi TT RS a top-notch sports car – available as a
    coupé or roadster.

    Sporty five-cylinder gasoline engines have a long legacy at Audi. The most
    famous is arguably the turbocharged 2.1-liter engine in the Audi quattro. The first
    version, which was launched in 1980, offered an impressive 147 kW (200 bhp).
    And the Sport quattro from 1984, directly inspired by motorsport, delivered a
    whopping 225 kW (306 bhp). For 25 years, turbochargers and quattro have been a
    dynamic formula for success.

    Audi has resumed using this recipe. Designed from scratch, the five-cylinder
    engine combines a turbocharger with FSI direct gasoline injection to elevate the
    TT RS to a high-performance sports car. The TFSI delivers 250 kW (340 bhp)
    from a displacement of 2,480 cc (151.34 cu in): a specific output of 100.8 kW
    (137.1 bhp) per liter.

    The power-to-weight ratio is also outstanding. In the case of the Coupé, which
    weighs in at a mere 1,450 kilograms (3,196.70 pounds), the power-to-weight ratio
    is just 4.3 kilograms per bhp. The Roadster has a weight of 1,510 kilograms
    (3,328.98 pounds) and a power-to-weight ratio of 4.4 kilograms per bhp – thanks
    to its extremely lightweight and largely aluminum body constructed as per the
    Audi Space Frame principle.

    The TT RS Coupé rockets from 0 to 100 km/h (0 to 62.14 mph) in 4.6 seconds;
    the Roadster needs just a tenth of a second longer. The limited top speed of 250
    km/h (155.34 mph) is merely the official figure for both versions; as an option,
    Audi can increase it to 280 km/h (173.98 mph).

    Almost even more impressive is the aggressive pulling power. The maximum
    torque of 450 Nm (331.90 lb.-ft.) is always available between 1,600 and
    5,300 rpm. In addition, the TT RS overtakes without the slightest effort. Last but
    not least, its engine makes passengers’ skin tingle time and again thanks to its
    speedy and powerful response, its inspiring free-revving character, and its
    unmistakably guttural tailpipes: five-cylinder classical music by Audi!

    Compact and Lightweight: The Five-cylinder TFSI

    As an uncompromising sports-car engine, the 2.5-liter TFSI is ultra-compact. Just
    49 centimeters (19.29 inches) in length, it is ideally suited for transverse
    installation in the TT RS. And its weight of just 183 kilograms (403.45 pounds)
    also sets a record. The crankcase is made of vermicular-graphite cast iron. This
    high-tech material unites the utmost in strength with low weight; it has otherwise
    only been used for the large TDI engines from Audi. Perfectly placed
    reinforcements enhance the block’s loadability. The lightweight cylinder head, the
    pistons, and the connecting rod are lightweight as well as high-strength.

    The ultra-powerful five-cylinder engine is extremely fuel-efficient, requiring an
    average of just 9.2 liters/100 km [25.57 mpg] as regards the Coupé (Roadster:
    9.5 l/100 km [24.76 mpg]). Switchable flaps in the intake manifold mix the
    incoming air in a calculated configuration. Injected at a pressure as high as
    120 bar by the common-rail system, the gasoline swirls intensely in the
    combustion chamber – which in turn cools the walls. This subsequently facilitates
    a compression ratio of 10.0:1, which is very high for a turbocharged engine. Both
    of the adjustable camshafts, controlled via chains, also enhance charging
    efficiency with respect to the air-fuel mixture.

    The large turbocharger generates up to 1.2 bar of boost pressure. The intercooler,
    fed air ideally by the lower segment of the single frame radiator grille, reduces the
    temperature of compressed air by over 80 percent at full load.

    When an Audi TT RS driver pushes the standard Sport button on the center
    tunnel, a flap installed in the left exhaust tailpipe renders the exhaust noise even
    more robust and intense while boosting engine responsiveness. An optional Sport
    exhaust system is available with matt black tailpipe trims and sound flap.

    For Purists: The Driveline

    The Audi TT RS is the first classic sports car in the Audi RS family. Like the
    RS 4 and the RS 6, the Audi TT RS was developed by quattro GmbH as a pure,
    no-holds-barred driving machine. A new six-speed manual transmission conveys
    the engine’s tremendous power, and permits easy and precise operation thanks to
    a specially designed shift lever boasting particularly short shift travel. The
    transmission’s defining characteristics are a high efficiency ratio and a sportily
    narrow spread of the gear ratios.

    The Audi TT RS features quattro permanent all-wheel drive as standard
    equipment. Its heart lies at the rear axle: an electronically controlled, hydraulic
    multi-plate clutch. If a situation calls for it, the clutch redirects a majority of the
    torque input from the front wheels to the rear wheels.

    Within milliseconds, a powerful electrical pump in conjunction with an
    accumulator presses together the clutch’s plates via hydraulic pressure. Additions
    to the quattro powertrain include a constant velocity joint before the propeller
    shaft and a compact rear-axle differential – both are heavy-duty components.

    The quattro drivetrain grants the Audi TT RS outstanding traction, fascinating
    dynamics, and superb stability. Winding rural routes or some laps around a
    racetrack allow the superior handling to shine. The precise and responsive
    steering, the instantaneous reactions of the chassis, the neutrality at the cornering
    limit, the grip while exiting a curve, and – time and again – the engine’s thrilling
    power: every mile in an Audi TT RS exudes the distilled essence of sportiness.

    High-tech Excellence from Audi: Chassis and Body

    The chassis of the Audi TT RS builds on the cutting-edge foundation of the base
    TT design. The four-link rear suspension, which handles longitudinal and lateral
    forces separately, plays a crucial role. The electromechanical steering is highly
    efficient and the power steering adjusts to the vehicle’s speed. With aluminum in
    the front and sheet steel in the back, the body’s innovative mixture of materials
    results in a well-balanced axle-load distribution, excellent crash safety, and the
    outstanding rigidity which lays the cornerstone for the car’s precise handling.

    The standard sports chassis, which lowers the body by 10 millimeters
    (0.39 inches), features tightly tuned springs and shock absorbers. The optional
    Audi magnetic ride adaptive damping system allows the driver to select one of
    two modes for the shock absorbers by simply pushing the Sport button. Dynamic
    mode enables the TT RS to hug the road; Comfort mode provides a pleasantly
    balanced ride perfect for long journeys.

    The sportiest version in the TT model line boasts 18-inch wheels fitted with
    245/45 tires. They are complemented by mighty ventilated disc brakes, which
    measure 370 millimeters (14.57 inches) in diameter at the front and 310
    millimeters (12.20 inches) at the rear. So that heat dissipates quickly, the front
    friction rings are perforated. They, in turn, are connected by hollow pins to the
    aluminum brake discs, which are encircled by black four-piston brake calipers
    made of aluminum and bearing RS logos.

    The Electronic Stabilization Program (ESP) can be switched off partially or
    entirely. In Sport mode, the engine does not intervene to monitor traction and,
    correspondingly, the brakes engage later than otherwise. In the second mode, the
    ESP is fully deactivated.

    The Face of Power: The Exterior

    At just 4.20 meters (13.78 feet) in length, the vigorously compact Audi TT RS
    hints at its explosive potential from the very first glimpse. The front spoiler tapers
    downward into a splitter, reminiscent of a racing car. The large and squared air
    inlets have diamond-shaped inserts. And the high-gloss black single frame grille
    with a frame in matt aluminum look and the TT RS badge bear the same styling.
    The xenon plus headlights with LED daytime running lights notify faraway
    drivers that an Audi TT RS is approaching.

    The sides of the vehicle are accentuated by large wheels in 5 twin-spoke design,
    vigorous side sills, and exterior-mirror casings in matt aluminum look. At the tail
    end, the two large oval exhaust tailpipes – spaced apart – are encircled by a
    diffuser insert. Here, too, is a TT RS badge. A stationary rear spoiler is standard,
    though customers can opt for one which automatically extends and retracts.

    Thanks to a drag coefficient of just 0.3, the 2+2-seat coupé and the two-seat
    roadster glide effortlessly through the wind. Audi offers the TT RS in eight colors.
    Among them are four exclusive options: Daytona Gray, pearl effect; Mugello
    Blue, pearl effect; Sepang Blue, pearl effect; and Suzuka Gray, metallic. The
    Roadster’s soft top comes in black or dark gray.






    Resources:

  • Discussion Forum: TT Mk2
  • Photo Gallery: Audi TT-RS
  • Sound Clip: Audi TT-RS (right click…save as)







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