can i put premium in a 91 model car without issues
Negative on all that.... You can only run straight A1!
In all seriousness, it doesn't matter what fuel you use. Some people have run E10 without any issues, some people use 91RON and others use premium and above.
Premium and V-power etc. I have found to make the engine a lot smoother than poo-fuel as well as increasing economy. You won't start getting 100,000kms per tank, but it does improve.