Turbocharged know-how
The 165 kW (225 bhp) 1.8T
The 132 kW (180 bhp) 1.8T
Clean sound from the exhaust system
Three-Shaft gearbox and short lever movements
Unbelievably quick reactions - the quattro

Turbocharged know-how

Audi's experience in the turbocharged-engine field has a long tradition and results from having the courage to adopt this innovative principle when it was still largely unknown. It was with turbocharged engines that Audi scored its many legendary rally and touring car racing successes, and it has honed this power source to a fine edge in both spark-ignition and diesel forms.

When developing engines for the Audi TT Coupé, the company's engineers had an outstandingly good foundation on which to build: the turbocharged 1.8-litre engine with five valves per cylinder. This engine had always placed the emphasis on abundant torque and was therefore ideal for the task. Using it as a reliable basis, many components were either modified or completely redesigned to suit the new task, from the turbocharger itself and the intake manifold to the electric engine management control unit. In this way it has been possible to increase the enginešs power output in the TT to 132 kW (180 bhp) and, in its more powerful guise, to no less than 165 kW (225 bhp).

One of the impressive technical features for which Audi's new turbocharged engines are noted is the design of the inlet ports. They impart a "tumble effect" to the charge air as it enters the combustion chamber. This effect increases the speed of the combustion process and thus ensures more complete combustion. The engine's efficiency is increased and its pollutant emissions are lowered. In this area the TT also benefits from the know-how acquired with the new V6 "biturbo" engine.

The new Audi turbocharged engines feature the latest electronic engine management generation, Motronic ME 7.5. The sheer number of functions that this adaptive system controls is most impressive: throttle butterfly position, boost pressure control, sequential fuel injection with air mass measurement by means of a hot-film sensor, mapped ignition characteristic with solid-state high-tension distribution system including individual coils for each cylinder, and cylinder-selective knock control with two sensors.

The engine management system senses the amount of torque which the driver wishes to have transmitted to the driven wheels and decides how this wish can be fulfilled most rapidly and economically; it then adjusts the throttle butterfly position, turbocharger boost pressure and ignition timing to the most suitable settings.

The accelerator pedal is no longer connected to the engine mechanically by a wire cable, but electronically. This enables the throttles to be opened and closed by precisely the amount needed in any given operating situation.

The adaptive or "self-teaching" engine management system also makes it possible to modify engine settings according to the grade of fuel which happens to be available, and to maintain the most favourable relationship between boost pressure, torque and ignition timing.

The new engine management control unit also enables all the car's electronically monitored and regulated functions to be brought together in a single unit. It is connected to the same central information line as the remaining control units, so that full co-operation between them is possible.

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The TT Introduction
The thoroughbred sports car: design, technical features, performance
The power train
Chassis, body and equipment
Quality made by Audi - TT assembly in Györ
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