What is the difference between the Audi A2 FSI and TDI engines?

I am considering buying a used Audi A2 and am unsure about the two engine options available: FSI and TDI. Can anyone explain the differences between them in terms of performance, fuel efficiency, and reliability?

The main difference between the FSI and TDI engines in the Audi A2 is the type of fuel they use. FSI stands for Fuel Stratified Injection and uses petrol, while TDI stands for Turbocharged Direct Injection and uses diesel. In terms of performance, the TDI engine has more torque and better fuel efficiency, while the FSI engine has slightly more horsepower. However, the TDI engine is generally considered to be more reliable in the long term due to its simpler design.

Having owned both an Audi A2 with the FSI engine and one with the TDI engine, I can attest to the differences between the two. The FSI engine is slightly more responsive and has a smoother rev, while the TDI has a bit more oomph and better fuel efficiency. Personally, I prefer the TDI for its reliability and better torque.

As a mechanic specialized in Audi vehicles, I would recommend the TDI engine for its overall reliability and lower maintenance costs compared to the FSI. The TDI engine is also more fuel-efficient, making it a better choice for long-term ownership. However, keep in mind that diesel engines can cost more to service and repair if any issues arise.