The issue is with the updated "Box2D asm.js" not being compatible with CarPhysics behavior (v0.1).
In order to run the tutorial successfully in newer Construct 2 revisions (including r210 beta), just close the "SideView_Car_Physics_0.1_tutorial.capx" project (if you have it opened) and then open it again *but* do not preview it just yet.
Change the "Physics engine" project property to "Box2D web" instead of "Box2D asm.js". This option can be found by clicking the folder name "New project" in the Projects tab (within the Project Bar view). Now you should be able to preview it.
By default Construct 2 only loads runtime scripts when previewing a project for the first time. So if you previewed the tutorial first before changing to "Box2D web", changing it later doesn't help, as the previous runtime scripts are not updated -- unless you close the project and open it again that is.
EDIT: This wasn't a problem for C2 revisions 196 and below.