underboosted

adjective3

1. •
   Suffering from underboost.

   • Aside from the intake cycle condition described above and when rapidly decelerating the engine, a helicopter power plant can not be seriously underboosted. — 1961
2. •
   Underpowered.

   • The Millenia's steering feels precise and is the most naturally weighted of the three (the Audi's felt overboosted just off center; the Volvo's, underboosted). — 1997
3. •
   Insufficiently promoted.

   • Our symbol of success is Saturn 5; the USSR is now the underboosted one. — 1967