What are the key differences between the Audi A4 45 TFSI and 40 TDI engines?

I am trying to decide between the two engine options for the Audi A4. Can you provide a breakdown of the main differences in terms of power, fuel efficiency, and performance?

The Audi A4 45 TFSI engine is a petrol engine with 241 horsepower and 273 lb-ft of torque, whereas the A4 40 TDI is a diesel engine with 187 horsepower and 295 lb-ft of torque. While the TFSI offers more power and torque, the TDI provides better fuel efficiency and lower CO2 emissions.

Both engines have their own advantages - the TFSI provides a more sporty and responsive driving experience, while the TDI offers better fuel economy for longer journeys. Ultimately, it comes down to your personal preferences and driving habits.

If performance is your priority, the TFSI engine would be the better choice. However, if you want to minimize your carbon footprint and save on fuel costs, the TDI engine is the way to go.