It is recommended on the fuel tank cap that 95 or 98, the gasoline with 92 can run, but the power of the car will be weaker after adding it, and the explosive power will be a little bit less, and the gasoline is not fully burned in the cylinder, which will lead to more carbon accumulation.
A short time can not see much difference, a long time, and the comparison of 95, the power will certainly be weaker. Vw still recommends 95 for these two cars.