Project CARS is the best racing game graphics and realism, beating Forza 6 and GT6 widely. In driving simulation and physics maybe not.
What is the reason you have shortage of cars?
These are cars that everyone wanted to play on Project CARS in Forza6 and GT6 can play.
maybe Polyphony Digital and Turn 10 have paid much money to the builders do not give license to Project CARS, for fear of being overcome.
GR.C
Porsche 962C (1986) - license delay
Toyota 88C-V (1988) - this should be, license obtained
Nissan R89C (1989) - license delay
Jaguar XJR-9 (1988) - this should be, is England
Mazda 787B (1991) - license delay
Peugeot 905 Evo 1 Bis (1992) - license delay
GT1
Lotus Elise GT1 (1997) - this should be, is England
Porsche 911 GT1-98 (1998) - license delay
Nissan R390 GT1 (1998) - license delay
LMP900
Toyota GT-One TS020 (1999) - this should be, license obtained
pescarolo C60 (2004) - license delay
LMP2
Porsche RS Spyder (2007) - license delay
Lola B08/80 (Honda/Mazda) - this should be, is England
LMP1
Audi R10 TDI (2007) - this should be, license obtained
Audi R15 TDI (2010) - this should be, license obtained
Peugeot 908 HDI FAP (2009) - license delay
Nissan GT-R LMP1 (2015) - license delay
Porsche 919 Hybrid (2015) - license delay