There is no definitive answer to this question since it depends on the specific models of Porsche and Audi TT cars in question.
However there are some general things to consider when trying to determine whether or not Porsche wheels will fit an Audi TT.
The first thing to consider is the size of the wheels.
Generally Porsche wheels are larger than Audi TT wheels. This means that if the Porsche wheel is too large for the Audi TT it will not fit properly.
Additionally the bolt pattern on the Porsche wheel may not match the bolt pattern on the Audi TT.
This means that the wheel may not be able to be securely attached to the car.
Finally the offset of the Porsche wheel may be different from the offset of the Audi TT wheel.
The offset is the distance between the center of the wheel and the mounting surface of the car.
If the offsets are different the wheel may not be able to sit flush against the car which could cause damage.
In general it is advisable to consult an Audi TT specialist or a Porsche specialist to determine whether or not the Porsche wheel will fit the Audi TT.
They will be able to take into account the specific models of each car and advise accordingly.
What If I Install Porsche Wheels On An Audi TT?
You could but it would look a bit silly. Audi TTs are designed to have certain looks and Porsche wheels wouldn’t quite match that style.
Additionally if you drove the car on the street it might not be legal to have Porsche wheels on an Audi TT.
Most states have regulations that dictate what kinds of wheels can be used on different types of cars.