It depends on how big the ferry is.
lots
Ferry
About 5000 cars can fit into an average car park. If you have lickle cars, you can fit more in, you,Tard!
you can fit a total of 8 cars in the garage
Usually you can fit 4 sedan cars. 2 cars and 2 in top of them.
The large cross-Channel ferries can hold 1,059 cars or 180 semi-trucks.
ferry
11,846
10
Ferry
13
None - they couldn't fit throgh the door.