the expression for striking another vehicle broadside does not refer to the steak of the same sobriquet

why is a T-bone steak so called then?

I was a little baffled by that comment, too. I was reminded of the famous (although probably apochryphal) student paper statement about The Iliad not having been composed by Homer but by someone else with the same name.

A t-bone steak is so named because it has a T shaped bone in it.
http://www.mailameal.com/jpgs/kitchen5/43.jpg