Audi TT RS

400 hp power output, from 0 to 100 km/h (62.1 mph) in 3.7 seconds, top speed of up to 280 km/h (174.0 mph): With the new aluminum five cylinder engine, the TT RS Coupé and TT RS Roadster deliver outstanding performance. Available for the first time in a series-production Audi: OLED rear lights. Like the Audi virtual cockpit and the comprehensive infotainment range, they demonstrate “Vorsprung durch Technik”.

“The newly developed turbo five-cylinder engine, with which we are continuing our great tradition from the 1980s, conveys pure emotion,” says Dr.-Ing. Stefan Knirsch, Audi Board Member for Technical Development.

“The TT RS now provides 400 hp and combines driving pleasure with efficiency through innovative technologies.” Lighter and stronger than ever before: the 2.5 TFSI engine The five-cylinder engine is a modern classic. A jury of international motor journalists has voted the 2.5 TFSI “Engine of the Year” six times in a row. Now Audi has again added to this and is using a completely newly developed turbo engine in the TT RS. It achieves a good 17 percent more performance from the unchanged 2,480 cc capacity – 294 kW (400 hp) means a specific value of 161.3 hp per liter.

The maximum torque of 480 Nm (354.0 lb-ft) is available between 1,700 revs and remains constant up to 5,850 rpm. This means that the new Audi TT RS Coupé accelerates from 0 to 100 km/h (0 to 62.1 mph) in 3.7 seconds, the Roadster takes 3.9 seconds. The top speed is regulated at 250 km/h (155.3 mph) as standard; upon request Audi will increase the top speed to 280 km/h (174.0 mph).

At less than 50 centimeters (19.7 in) in length, the 2.5 TFSI engine is extremely compact and is 26 kg (57.3 lb) lighter than the previous model. Its crankcase is made of aluminum, which alone saves 18 kg (39.7 lb). The overall weight of the new TT RS and its axle load distribution benefit significantly from this. Elaborate measures reduce internal friction while at the same time increasing power output. The cylinder liners are plasmacoated; the crankshaft main bearings have been made 6 mm (0.2 in) thinner.

The crankshaft is hollow bored and is therefore 1 kg (2.2 lb) lighter; the aluminum pistons integrate channels for cooling oil. In the short warm-up phase after a cold start, the switchable water pump does not
circulate the coolant in the cylinder head – the 2.5 TFSI engine reaches its operating temperature more quickly. This lowers the coefficient of friction and reduces fuel consumption. The gas exchange of the five cylinder engine is designed for high throughput. The large turbocharger compresses the intake air with up to 1.35 bar of pressure. The intercooler with its efficiency level of 80 percent reduces the temperature for the highest possible oxygen percentage.

Intake and exhaust camshafts can be adjusted as required. On the exhaust side, the Audi valvelift system (AVS) changes the duration of valve opening depending on the throttle and engine speed at two levels – for moderate use at low and partial throttle as well as slower throttle response and increased tractive power at full throttle. For better mixture preparation, the new 2.5 TFSI engine works with a dual injection system. It provides the option of injecting fuel into the inlet manifold as well as directly into the combustion chamber. The angle, duration and type of injection can be variably optimized for each engine operation point.

The firing interval is 144 degrees: Based on the 1-2-4-5-3 firing order, cylinders positioned directly beside each other and far away from each other fire in alternation. This results in a very special rhythm and character. The uneven number of cylinders results in harmonic frequencies that accompany the basic tone. The engine control unit also contributes to the unmistakable sound. At higher throttle, the flaps in the exhaust system open for an even fuller sound. The driver can control the exhaust flap both with the standard RS exhaust system and with the optional RS sport exhaust system with black tailpipe trims using the sound button on the center console.

Source: Audi

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