Engine choice depends on the model year and variant. Most regular Audi TT models use a turbocharged four-cylinder petrol engine, commonly a 1.8 or 2.0 TFSI. The TTS generally uses a higher-output 2.0 TFSI, while the TT RS is known for its 2.5 TFSI five-cylinder engine. Some older or overseas-market versions also came with a 3.2-litre VR6 or diesel engine.
奧迪 TT 用咩引擎要睇年份同版本。一般 TT 多數配渦輪增壓四汽缸汽油引擎，常見有 1.8 TFSI 或 2.0 TFSI；TTS 通常用高輸出 2.0 TFSI，TT RS 就用 2.5 TFSI 直列五汽缸引擎。部分舊款或海外版本亦曾經配 3.2 公升 VR6 或柴油引擎。
