That sounds like an impressive modification to the Big M harvester in the Unreal Farming mod by Arthur W. The increased power to 820 HP should definitely help with harvesting efficiency, allowing it to tackle larger fields with ease. The boost in the top speed on the road to 83 km/h will also save time when transporting the harvester between fields.
With a working width of 22m and a working speed of 30 km/h, this modified Big M should be able to cover a substantial amount of farmland in a shorter period, making it a valuable asset for any virtual farmer looking to increase productivity.
It seems like Arthur W has taken the Big M to the next level in terms of performance and efficiency, providing players with a powerful and fast harvester for their Unreal Farming experience.