Thank you for the point. I'm rather puzzled why you say it's 1926 when the last picture you posted says Lanner raced the car in 1925?
I found the car in "Autos im Lanner Familienalbum" and the picture below says:
"Riesrennen 1924 - ÖAF Austro Fiat AF1 - 2 ltr., 60 PS
- Bestzeit Tourenwagen, 3. Platz gesamt"
And Google translates as: "Ries race 1924 - ÖAF Austro Fiat AF1 -. 2 ltr, 60 hp
- best time touring car, 3 Place overall"