2009 Audi S3 Sportback Overview

In comparison with the A3, the two-liter engine in the S3 has been intensively further developed. The turbo, with its upsized turbine and compressor turbine wheel, builds up a relative charge pressure of up to 1.2 bar. A reengineered charge air cooler significantly lowers the temperature of the compressed air and thereby increases the air mass required for combustion.

Pistons with reinforced pins operate within this, the most powerful TFSI engine; reinforced, newly mounted connecting rods transmit the forces onto the crankshaft. The cylinder block has been stiffened, with its head being cast from a new, high-temperature alloy. The exhaust camshaft timing has been adapted to the increased output, whilst the high-pressure injectors have been provided with increased cross-sections. With all of its concentrated technology, the highperformance, turbocharged engine weighs just 152 kg (335.10 lb), less than comparable engines from direct competitors.

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