I have a theroetical question: If GT7/GT8 were to bring back say: the 2004 Audi A4 touring car, what class would you think it would be placed in?
The 90's DTM cars (see Alfa 155) seem to be placed in Gr.4, while the modern DTM cars are places in Gr.2. This would make the logical assumption that the A4 would be in Gr.3
BUT DTM cars in GT always seem to be paired with their respective GT500 cars(barring the Alfa), which seem to switch over from Gr.3 to Gr.2 sometime in between 2000(The latest Gr.3 GT500) and 2008(the earliest Gr.2 GT300.) This switch I presume happens around 2003-2004 when a major rules shakeup happened.
So would the A4 follow suit with the JGTC cars, or would that distinction wait until the classes own major technical update around 2013?
Also on the Alfa being Gr.4 - is it REALLY a Gr.4 car? Or was it simply put there instead of Gr.3 because it is 4WD, thus outlawing it from Gr.3, where all cars are RWD only.
I honestly have the same questions towards older GT300 cars or something like the Tickford Falcon, but I think that further goes to show how outdated the Group system is for current Gran Turismo.
I guess it would depend on whether the
A4 Touring Car had comparable levels of downforce & grip to the 2008 GT500's. If not, then it might end up as a higher-downforce Gr.3 car like the Subaru
BRZ. It's definitely in a weird position.
Also since in GT6 the
A4 only had 453BHP, I'd assume Gr.3 would be more likely as it would need a significant power increase from stock for Gr.2, which rarely happens with BoP.
A lot of the others are probably easier to guess where they'd fit in, as you mentioned with them being grouped together with the JGTC cars in older games a lot of the time.
The
Astra,
CLK &
TT would all likely go in Gr.3, while the
Calibra would be in Gr.4 with the
155 (both heavily restricted).
The
Falcon is in a weird position itself, as though it has 599BHP, it also weighs a really heavy 1,350kg. Combining that weight to the fact that the car is old and relatively simple on downforce, that one might end up in Gr.4 with a heavily restricted engine, rather than Gr.3.
Then the
GT300's from when they were still limited to 300BHP would all go into Gr.4.
If my guesses are correct, it would also have the cool side-effect of Opel being eligible for the Manufacturer Series, since one of their cars would be Gr.3 (Astra) and the other Gr.4 (Calibra).