Though the model number of every Land Cruiser (note the FJ Cruiser is NOT a Land Cruiser) reflects the motor, they also have "street names" ie. Prado, Troopy, Trayback, Pig, etc. The FJ25, BJ44, FZJ80, UZJ100, etc are all Land Cruisers, with F, 3B, 1FZFE, etc motors. The actual FJC call is a GSJ15 as I recall... Though I don't think the motor is a GSJ??? I could be wrong?
Though they have roots from an actual Land Cruiser (the non-US Prado), they have more in common with a 4Runner/Tacoma then they do and actual Land Cruiser. While some will argue they are a Land Cruiser... its moot... every other Land Cruiser in history has some version of this:
FJ Cruisers don't