Notes, as per your request

1. Speeds in marlin are in mm/minute, not mm/sec. The values must be multiplied by 60 if mm/sec is expected.
2. Both `machine_start_gcode` and `machine_end_gcode` do not work. Perhaps these should be plain text files, as discussed.
3. `wall_line_count` should be able to be adjusted for with `(wall_thickness / machine_nozzle_size)`, if given, instead of count.
4. missing `retraction_distance` normally 1.75mm
5. missing `retraction_retract_speed` normally 10mm/s
6. missing `retraction_prime_speed` normally 10mm/s
7. missing `retraction_extra_prime_amount` normally 0
8. missing `retraction_minimum_travel` normally 1mm
9. missing `maximum_retraction_count` normally 90

That said, here are the parameters with consideration as to the above bugs.

```
./extcuraengine slice -l ~/Torus.ast \
-o ~/out.gcode \
-s machine_width=160 \
-s machine_depth=160 \
-s machine_height=100 \
-s machine_nozzle_size=0.5 \
-s material_diameter=2.85 \
-s outer_inset_first=False \
-s infill_sparse_density=100 \
-s layer_height=0.25 \
-s wall_line_count=2 \
-s support_enable=False \
-s top_bottom_thickness=1.0 \
-s infill_line_width=0.5051 \
-s speed_infill=3600 \
-s speed_layer_0=900 \
-s speed_travel=10500 \
-s speed_wall_0=900 \
-s speed_wall_x=1800 \
-s machine_start_gcode=";\n" \
-s machine_end_gcode=";\n"
```

You have the .AST to test on that I gave you.
--Cheers!