Try setting id of your image. then in handleClick method you can get your current image id.
@{int i = 0;}
@{foreach (System.Data.DataRow sp in ViewBag.view.Rows)
{
<div class="col-sm-3 img" >
<h5><p style="margin-left:50px">@sp["Model_Number"].ToString()</p></h5>
<img id="Img_@i" onmouseover="bigImg(this)" onmouseout="normalImg(this)" src="@sp["Image"].ToString()" onclick="handleClick(this)" style="height:180px;width:170px;border:groove;border-width:2px;border-color:yellow"/>
<p style="margin-left:30px;" >@sp["Manufacture"].ToString()</p>
<input name="id" value="@sp["Machine_Id"].ToString()"/>
i++;
</div>
}}
Good luck.