The following is a list of every vehicle in the game:

Cars
Admiral
Albany
Banshee
Blista Compact
Blista
Bucanneer
Chavos
Cognoscenti
Comet
Coquette
DF8-90
Dilettante
Dukes
Emperor
Esperanto
Faction
Feltzer
Feroci
Fortune
Futo
Infernus
Intruder
Lokus
Manana
Marbelle
Merit
Oracle
PMP 600
Phantom
Premier
Presidente
Primo
Roman's Taxi
Romero
Ruiner
Sabre GT
Sabre
Schafter
Sentinel
Stallion
Stratum
Sultan
Sultan RS
Super GT
Turismo
Uranus
Vigero
Vincent
Virgo
Voodoo
Washington
Willard

SUVs, vans, and trucks
Biff
Bobcat
Boxville
Cavalcade
Cavalcade FXT
Contender
Flatbed
Habanero
Huntley Sport
Landstalker
Minivan
Mr. Tasty
Moonbeam
Noose Patriot
Packer
Patriot
Perennial
Rancher
Rebla
Ripley
Securicar
Speedo
Steed

Motorcycles
Faggio
Freeway
Hellfury
NRG 900
PCJ 600
Sanchez
Zombie

Boats
Dinghy
Jetmax
Marquis
Tropic

Aircraft
Annihilator
Helitours Maverick
Maverick

Commercial and emergency vehicles
Ambulance
Brute
Bus
Cabbie
Enforcer
FIB Buffalo
Firetruck
Forklift
Police Cruiser
Police Patrol
Police Stockade
Predator
Sky Tram
Subway Tram
SWAT Van
Taxi
Trashmaste