The tanks were all the same capacity I think. 42 litres including the 5 litre "reserve" (The orange bit on the fuel gauge.)
I put 36 litres into mine last week and it had just hit the orange mark.
That breather loops back and forth right across the car. I know it well because mine had been melted by the exhaust and was blocked. This lead to negative pressure in the tank and fuel pump issues. The filler would hiss when you took the cap off.
Pete