Ansys 8.1 include Ansys Multiphysic ,and not include the ansys emag. but include the electromagnetic simulation .
Electromagnetic simulations are critical to electrical and electronic product designs across many industries. Applications involve everything from rotating machines (motors and alternators), sensors and actuators, power generators and transformer systems, and Micro Electro Mechanical Systems (MEMS). ANSYS Emag provides a comprehensive range low-frequency analysis features to address the diverse needs of the electromagnetics engineer, from motor design to ion optics.
Ansys Workbench Suites 8.1 doesn't include Ansys Multiphysis ,ANSYS Workbench is a desktop simulation tool that enables you to perform more product development tasks faster.