How does the engine of the Audi 80 differ from the Audi 90?

I am trying to understand the technical differences between the engines of the Audi 80 and Audi 90. Can someone provide a clear explanation?

The Audi 80 and Audi 90 have different engine sizes, with the Audi 80 having a 1.8L engine and the Audi 90 having a 2.0L engine. This means that the Audi 90 will have slightly more power and torque, but also may use more fuel.

In addition to the engine size, the Audi 80 and Audi 90 also have different engine codes, meaning that some parts may not be interchangeable. It is important to consult with a mechanic or do thorough research before attempting to swap parts between the two models.