The consumers perceived the smaller V8 as grossly underpowered by American standards. The Judd powerplant was also considerably underpowered in comparison to the other factory teams. The resulting performance of the tank was dismal; being severely underpowered and very fuel intensive. It proved to be underpowered, so Bramo 323 P engines were then fitted. Furthermore, they were slow, underpowered and often broke down. Although a good engine, it was underpowered for the vehicle. It demonstrated good control when taxiing, but was too underpowered to take off. Despite these improvements the engine was underpowered and unrefined in comparison with the competition. Nonetheless, the Me 323 remained significantly underpowered. The XF-89 was fitted with Allison J35-A-9 turbojets and proved to be seriously underpowered. It was also underpowered when towing and loaded. Even with this engine there is widespread agreement that the aircraft was underpowered. Devers pronounced the M3 "overweight, underpowered, and insufficiently armed". It was seriously underpowered and was no match for the enemy fighters of the period. Even on an underpowered machine, Lubuntu should perform very well.