In Battlefield 1942, the Jeep has seats for only two people and is fast, but low armor and the occupants are completly exposed. However its speed can be used as a way to transport two players into a flag
The Driver has no weaponary he can use and can be killed with stray bullets. The driver must rely on quick reaction to avoid enemy tanks and Anti-Tank troops.
The passenger can't use his weapon and is exposed just like the driver.
In Battlefield 1943, the Willys MB spawns regularly at certain USMC controlled flags. They're very fast and maneuverable, but it has weak armor, as 1 or 2 rifle grenades can take it out. An M1919 Browning is even capable of taking it out, however it is very difficult to do so. It also has very little protection for the driver and passengers. However, they're the fastest land vehicle in the game, along with the Type 95 Kurogane. It can transport 3 players: one driver, one passenger (capable of using all of their infantry weapons) and one gunner (manning an M1919 Browning).