You are attempting to use ACF to get a field that is not an ACF field. The only reason that it works at all is that it is a simple text field.
Since this is not an ACF field then you need to use get_post_meta() and you need to test the value to see if it is yes or no
$value = get_post_meta($post->ID, 'doors', true);
if ($value == 'YES')
?><div class="feature">With doors</div><?php
}