The collision, involving a red Xsara Picasso and a silver Kawasaki motorcycle, happened in Aberhosan at 09:30 BST on Monday.
His family said in a statement he was a "beloved father and grandfather whose passion was motorcycles".
"He is in our hearts as long as they still beat," the statement added.
The motorcyclist who died after a crash near Machynlleth, Powys, has been named as 67-year-old Malcolm Willis from the Telford area.