Some suggestions from a car historian :-)
A marvellous game, indeed!! CAn't wait to see the full release!!
My suggestions:
-Starting time in 1890 and not 1946,
-More adequate historical options (drum brakes, SV engines, many more),
-more details regarding the equipment and interior (comfort, safety, etc.) ,
-maybe introduce a list of optional equipmetn/different engines and bodies for one model (e.g. a I4/V6 engines, manual/auto transmissions, 2d/4d bodies, etc)?
Thank you and keep up the great job!!