We　propose　a　scheme　for　generating　superpositions　of　coherent　states　for　both　the　centre-of-mass　and　relative　vibrational　modes　of　two　trapped　ions.　In　the　proposed　scheme　two　trapped　ions　are　driven　by　two　laser　beams　dispersively　tuned　to　the　first　lower-　and　upper-vibrational　sideband　transitions,　respectively.　Under　certain　conditions,　the　measurement　of　the　internal　states　leaves　one　vibrational　mode　in　a　superposition　of　two　coherent　states.　Entangled　coherent　states　for　these　two　vibrational　modes　can　also　be　generated.　The　scheme　can　be　used　to　measure　the　Wigner　function　of　one　vibrational　mode　given　that　the　other　mode　is　initially　in　the　vacuum　state.