Goals from Rhys Williams, Simon Church and Rhoys Wiggins saw Wales progress into the play offs for the final places in Sweden 2009.
Wales are one of 14 teams who will play off for 7 places to join hosts Sweden in next years Championships.
The 14 teams in the play offs are: Italy, Turkey. England, Spain, Switzerland, Finland, Austria, Serbia, Germany, Wales, Belarus, Israel, France, Denmark.
Romania U21: Tatarusanu, Homei (Ochirosii 69), Tudose, Mardare, Sepsi, Tanase (Deac 45), Ropotan, Chiacu, Keseru, Torje (Bicfalvi 58), Stancu.
Subs Not Used: Panitilimon, Latovlevici, Luchin, Hora.
Booked: Stancu, Mardare, Chiacu, Ochirosii.
Wales U21: fon Williams, Blake (Mike Williams 21), Wiggins, Ramsey, Eardley, Rhys Williams, King, Bradley, Church, MacDonald, Adams.
Subs Not Used: North, Allen, Basey, Brown, Klein-Davies.
Booked: Rhys Williams.
Goals: Rhys Williams 12, Church 57, Wiggins 67.
Att: 8,000