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We calculated the energy and momentum densities of stiff fluid solutions,using Einstein, Bergmann-Thomson and Landau-Lifshitz energy-momentum complexes,in both general relativity and teleparallel gravity. In our analysis we getdifferent results comparing the aforementioned complexes with each other whencalculated in the same gravitational theory, either this is in generalrelativity and teleparallel gravity. However, interestingly enough, eachcomplex's value is the same either in general relativity or teleparallelgravity. Our results sustain that (i) general relativity or teleparallelgravity are equivalent theories (ii) different energy-momentum complexes do notprovide the same energy and momentum densities neither in general relativitynor in teleparallel gravity. In the context of the theory of teleparallelgravity, the vector and axial-vector parts of the torsion are obtained. We showthat the axial-vector torsion vanishes for the space-time under study.Comment: 15 pages, no figures, Minor typos corrected; version to appear in  International Journal of Theoretical Physic

Energy and Momentum Densities of Cosmological Models, with Equation of State ρ=μ, in General Relativity and Teleparallel Gravity