As long as you only want to drive it while you are here then not a problem, if you plan on registering it in Poland it needs to be under 10 years old and you will have to pay import tax on it also.
I Get cars from the States I buy have a family member drive it around for 6 months and ship to the UK where i register it and then pay no import tax because i have owned it and driven it outside of the country for the allowed amount of time
You can have it registered in Poland duty and tax free as "mienie przesiedlenia" (settler's effects) if you or your wife has a Polish citizenship. The car has to be registered outside Poland in your name for at least 6 months before you can claim it as your "mienie przesiedlenia" in Poland.
You don't have to be permanently settled in Poland to bring your "minie przesiedlenia"