I will be renting a car and driving from Killarney to Dublin. How long will it take and are there any sites along the way (or sort of along the way) that we should stop at?
The trip is 304km (190 miles) and should take between 4 -5 hours.
The trip will take you through Limerick City which of course is worth visiting.
I would advise getting a guide book to Ireland and looking at towns etc.. on the journey and see whether there are any sites of interest there.