Hi Wim
Here is a link that you may find useful
Ford Sierra 2.0 CL 105BHP
The engine data would seem to point to 2 litre Pinto engine.
That said, not sure if all Pinto engined were fitted with a type 9 gearbox !!??
You could ask the seller if the gearbox bell housing is alloy or steel
If alloy it will be a MT75 box
If steel it will be a type 9