| M-400 | M-440 | |
| Length, cm | 400 | 440 |
| Width, cm | 173 | 173 |
| Length of cockpit, cm | 286 | 326 |
| Width of cockpit, cm | 82 | 82 |
| Diameter of balloons, cm | 42 | 42 |
| Quantity of compartments, pcs | 3+1 | 3+1 |
| Capacity of passengers: Maximal, pers. | 6 | 7 |
| Carrying capacity, kg | 750 | 850 |
| Capacity of the engine: Maximal, h.p. | 25 | 30 |
| Packing dimensions, cm | 150x70x55 | 155x80x60 |
| Weight of boat in a pack, kg | 80 | 91 |