Troubles with “for each”

I have a custom post type called Vehicles. For it, I defined an ACF field called “acf_type” which presents a selection among multiple choices: bike, car, etc.

I’d like to show some identical HTML for each one of these types, grouping them one after the other in the same page. For example:

<div class="title">Bike</div>
<div class="description">something something</div>

<div class="title">Car</div>
<div class="description">something something</div>

To achieve this, I tried the following:

[loop type=vehicles orderby=name]
 [for each=acf_type]
   <div class="title">[field acf_type]</div>
   <div class="description">[field acf_description]</div>
 [/for]
[/loop]

but I obtain nothing. I either misunderstand the purpose of “for each”, or I’m doing some mistakes with the syntax.

Any help would be greatly appreciated.