 Like all Type XXIII U-boats, "U-2321" had a displacement of when at the surface and while submerged.She had a total length of (o/a), a beam width of (o/a), and a draught depth of .The submarine was powered by one MWM six-cylinder RS134S diesel engine providing , one AEG GU4463-8 double-acting electric motor electric motor providing , and one BBC silent running CCR188 electric motor providing .