Can you use parts from a audi to fix a porsche?

I have a 84 Porsche and need parts to fix it, I was told that I can use Audi and Volkswagen parts to fix it. Is this true and what year can I use or compare from these models?|||Some are useable some are not.





Engine wise, I wouldn't think so.





And most of the interior is different.|||would you use your toilet brush to clean your teeth...????|||In a word, no. That would generally be a mistake unless the part in question happens to be spec'd exactly as needed. Still, these are different cars. Don't do it. Go to a qualified tech and have it done right.