If something is one block long in the real world how many tiles would that be in the SimCity 4 game?
A SimCity tile is 16m wide and city blocks can vary from 79m to 120m so i would say between 4 and 8 tiles. Hope this helps :)
I'd say "normal" sized blocks in most historic areas have lengths ranging anywhere from 4 to 12 tiles.
You might find this site (http://www.thegreatamericangrid.com/infographics) interesting, it lists block sizes in a lot of major US cities. Keep in mind that one tile in game is about 50 feet by 50 feet.