  We introduce the stable presentation length of a finitely presented group.
The stable presentation length of the fundamental group of a 3-manifold can be
considered as an analogue of the simplicial volume. We show that the stable
presentation length have some additive properties like the simplicial volume,
and the simplicial volume of a closed 3-manifold is bounded from above and
below by constant multiples of the stable presentation length of its
fundamental group.
