The Audi A4 and A6 2.5 TDI models from 2003 onward feature the robust 2.5-liter inline-5 turbocharged diesel engine, known for its strong torque output, smooth power delivery, and durability. Equipped with direct fuel injection and a variable geometry turbocharger, this engine balances performance with fuel efficiency, making it well-suited for midsize and executive sedans. The distinctive sound and dependable nature of the 2.5 TDI have made it a favorite among diesel enthusiasts.

Key Features:

• 2.5L inline-5 turbocharged diesel engine

• Direct fuel injection system

• Variable geometry turbocharger (VGT)

• Strong torque and smooth acceleration

• Durable and reliable engine design

• Used in Audi A4 and A6 models from 2003 and later