Go around server yourself and see?
Infernus, Patriot, Hunter, Hydra, Maverick, Rustler, Sea-sparrow, NGR-900, Sanchez, Admiral, Quad, Cargobob, Beagle, Dinghy, Predator, Speeder, Barracks, Sultan, ...
I cna tell you for sure that there is 31 vehicle models, but I can't remmeber all of them atm.
And I have no idea what vehicles there will be in v3.