Performing the necessary action will unlock the vehicle for purchase in any garage.

Vehicle	How to unlock
1956 Chevrolet Bel Air	Complete Open Race Activity 2
1963 Aston Martin DB5	Complete Smash Activity 3
1965 Alfa Romeo Giulia T2	Complete Adrenaline Activity 4
1966 Jaguar E-Type	Complete Adrenaline Activity 3
1967 Shelby GT500 Fastback	Complete Sprint Activity 9
1968 Ford Mustang GT Fastback	Complete Sprint Activity 8
1970 Dodge Challenger R/T	Complete the story mode.
1970 Oldsmobile Cutlass 4-4-2	Complete Sprint Activity 2
1970 Oldsmobile Vista Cruiser	Purchase the Presidio Garage
1970 Pontiac GTO The Judge	Complete Sprint Activity 4
1971 Pontiac LeMans	Complete Sprint Activity 7
1972 Lamborghini Jalpa	Complete Speed Trap Activity 1
1972 Lamborghini Miura	Complete Smash Activity 4
1974 Dodge Monaco	Complete Sprint Activity 2
1974 Ford Gran Torino	Purchase the first garage
1977 Pontiac Firebird TRANS AM	Complete Sprint Activity 3
1978 Lamborghini Countach LP400S	Complete Speed Trap Activity 3
1983 DeLorean DMC-12	Complete Sprint Activity 1
1983 GMC Vandura	Complete Smash Activity 2
1984 Y.A.R.E. Buggy	Complete Pursuit Activity 3
1986 Chevrolet Camaro Z28 IROC-Z	Complete Sprint Activity 5
1988 Jeep Wrangler Softtop	Complete Relay Race Activity 1
1994 Lamborghini Diablo VT	Complete Race Takedown Activity 5
1997 McLaren F1	Purchase the Lighthouse Bay Garage
1998 GMC Sierra 4x4 Monster Truck Edition	Purchase the Forest Hill Garage
1998 GMC Sierra Pick Up	Purchase the Forest Hill Garage
1998 Nissan Skyline GT-R R33 R-Drive	Complete Race Takedown Activity 2
1999 Ford Crown Victora BAPD Police Cruiser	Complete Getaway Activity 1
1999 Ford Crown Victoria	Purchase the first garage.
2006 Chevrolet Impala	Purchase the Downtown garage
2007 Dodge Charger SRT-8 BAPD Police Interceptor	Complete Getaway Activity 3
2007 Lamborghini Murcielago LP640	Purchase the Lighthouse Bay Garage
2008 Ford F350 Super Duty Shortcab	Purchase the Forest Hill Garage
2008 Ford Mustang GT Convertible	Complete Team Race Activity 1
2008 Maserati GranTurismo S	Purchase the Presidio Garage
2008 McLaren Mercedes SLR	Purchase the Lighthouse Bay Garage
2009 Dodge Viper SRT-10 ACR	Complete Team Race Activity 2
2009 Fiat 500 Abarth	Complete Open Race Activity 1
2009 Hummer H3-X	Complete Race Takedown Activity 3
2009 Lamborghini Gallardo LP560-4V	Complete Team Race Activity 5
2009 Pagani Zonda STS Cinque	Complete Pursuit Activity 4
2009 Volkswagen Scirocco RallySport	Complete Open Race Activity 3
2010 Alfa Romeo Giulietta	Complete Race Activity 2
2010 Audi Q7 4.2 FSI Quattro	Complete Team Race Activity 4
2010 Cadillac DTS	Purchase the first garage
2010 Cadillac Escalade BAPD Rhino	Complete Getaway Activity 2
2010 Chevrolet Camaro SS	Complete Race Takedown Activity 1
2010 Chevrolet Corvette ZR-1 BAPD Highway Police	Complete Getaway Activity 4
2010 Dodge RAM 3500 Larame	Purchase the Forest Hill Garage
2010 Ford F150 XLT SuperCrew	Purchase the Forest Hill Garage
2010 RUF RK Coupe	Complete Team Race Activity 3
2010 Shelby GT500	Complete Race Activity 3
2011 Camion Firefighter 505	Complete Firefighter Activity 1
2011 Camion Firefighter A.E.R.V.	Complete all Firefigher Activities
2011 McLaren MP4-12C	Purchase the Lighthouse Bay Garage
2011 Van Doorn Atlus 3.8L Cash Transport	Complete Shift Protect Activity 2
2011 Van Doorn Atlus 3.8L Prison Transport	Complete Shift Protect Activity 1