Had the same issue with myself and my husband's game: we both have the same version of Asphalt 8 playing on windows10 laptops.
Solved it by setting up a private network with a homegroup (a windows feature - which in itself caused a bit of trouble - many windows services needed to be auto-enabled and other network settings checked- however, how to create and join a windows homegroup is well described elsewhere and not necessarily difficult!)
Once both computers where joined to the homegroup, we were able to create and join our own local wi-fi races in Asphalt 8.