TT gets RS power

  • 30-Apr-2009 03:55 EDT
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The Audi TT RS comes standard with a fixed rear spoiler, but an automatically deploying system is optional.

Audi’s powerful addition to its range announced at the Gene­va Motor Show ­was the TT RS quattro in Coupe and Roadster forms, with a new, 2.5-L 250-kW (335-hp) five-cylinder turbocharged engine. Peak torque is 450 N·m (332 lb·ft) from 1600 to 5300 rpm, and performance figures include a 0-100 km/h (0-62 mph) time of 4.6 s. Combined fuel consumption is 9.2 L/100 km.

The 49 cm (19.3 in) long, 183-kg (403-lb) engine is installed transversely in the TT. Weight savings includes the use of vermicular-graphite cast iron for the crankcase. Audi has previously used the material for larger-capacity TDI (diesel) engines. Fuel injection pressure is 120 bar (1740 psi), compression ratio is 10:1, and the turbo generates up to 1.2 bar (17.4 psi) of boost. The engine drives through a six-speed manual gearbox.

Aware of the importance of a sports car’s aural signature, Audi has given the quattro GmbH-developed TT RS dual-noise capability: a driver-operated Sport button opens a flap in the left-hand exhaust tailpipe to boost sound levels. An optional Sports exhaust system is also available.

Suspension includes a four-link rear configuration, steering is speed-sensitive electromechanical, and the car’s sports chassis is 10 mm (0.4 in) lower than that of a regular TT. Audi magnetic ride is optional. Wheels are 18-in carrying 245/45 tires. Ventilated disc brakes measure 370 mm (14.6 in) front, 310 mm (12.2 in) rear. The ESP (Electronic Stabilization Program) can be switched off partially or totally.

Aerodynamic aids include a front spoiler that tapers into a splitter. The car’s two tailpipes are encircled by a diffuser insert. A fixed rear spoiler is standard, but a deployable system is an option. The Coupe’s Cd is 0.30.

Top speed of the TT RS is limited to 250 km/h (155 mph), but an extra cost option allows this to be raised to 280 km/h (174 mph).

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