BMP-1

Source: http://en.wikipedia.org/wiki/BMP-1
Crew: 3 (commander, driver and gunner) + 8 passengers 
The Red Army Mechanized infantry tactics during the 1950s were similar to World War II methods in which APCs were used as "battle taxis"; they would keep the infantry in close proximity with the battle-tanks during movement, but upon enemy contact they would unload their infantry before retreating to safer areas