Audi a4 engine rigorous engineering ensures that the A4\'s powertrain is built to last and perform. The 2.0-liter TFSI® engine is made of lightweight aluminium, which helps to reduce overall vehicle weight and improve handling. Advanced cooling systems keep engine temperatures stable even during enthusiastic driving, and the turbocharger is built to last. These characteristics demonstrate Audi\'s dedication to developing engines that work flawlessly over time.