diff --git a/rhodecode/apps/repository/views/repo_pull_requests.py b/rhodecode/apps/repository/views/repo_pull_requests.py
--- a/rhodecode/apps/repository/views/repo_pull_requests.py
+++ b/rhodecode/apps/repository/views/repo_pull_requests.py
@@ -357,6 +357,9 @@ class RepoPullRequestsView(RepoAppView, 
                 pull_request_id=pull_request_id))
 
         versions = pull_request_display_obj.versions()
+
+        c.commit_versions = PullRequestModel().pr_commits_versions(versions)
+
         # used to store per-commit range diffs
         c.changes = collections.OrderedDict()
 
diff --git a/rhodecode/model/db.py b/rhodecode/model/db.py
--- a/rhodecode/model/db.py
+++ b/rhodecode/model/db.py
@@ -3821,8 +3821,12 @@ class ChangesetComment(Base, BaseModel):
         return q.all()
 
     @classmethod
-    def get_index_from_version(cls, pr_version, versions):
-        num_versions = [x.pull_request_version_id for x in versions]
+    def get_index_from_version(cls, pr_version, versions=None, num_versions=None):
+
+        if versions is not None:
+            num_versions = [x.pull_request_version_id for x in versions]
+
+        num_versions = num_versions or []
         try:
             return num_versions.index(pr_version) + 1
         except (IndexError, ValueError):
diff --git a/rhodecode/model/pull_request.py b/rhodecode/model/pull_request.py
--- a/rhodecode/model/pull_request.py
+++ b/rhodecode/model/pull_request.py
@@ -610,6 +610,20 @@ class PullRequestModel(BaseModel):
         return _org_pull_request_obj, pull_request_obj, \
                pull_request_display_obj, at_version
 
+    def pr_commits_versions(self, versions):
+        """
+        Maps the pull-request commits into all known PR versions. This way we can obtain
+        each pr version the commit was introduced in.
+        """
+        commit_versions = collections.defaultdict(list)
+        num_versions = [x.pull_request_version_id for x in versions]
+        for ver in versions:
+            for commit_id in ver.revisions:
+                ver_idx = ChangesetComment.get_index_from_version(
+                    ver.pull_request_version_id, num_versions=num_versions)
+                commit_versions[commit_id].append(ver_idx)
+        return commit_versions
+
     def create(self, created_by, source_repo, source_ref, target_repo,
                target_ref, revisions, reviewers, observers, title, description=None,
                common_ancestor_id=None,
diff --git a/rhodecode/templates/compare/compare_commits.mako b/rhodecode/templates/compare/compare_commits.mako
--- a/rhodecode/templates/compare/compare_commits.mako
+++ b/rhodecode/templates/compare/compare_commits.mako
@@ -12,6 +12,9 @@
     <input type="hidden" name="__start__" value="revisions:sequence">
     <table class="rctable compare_view_commits">
         <tr>
+            % if hasattr(c, 'commit_versions'):
+                <th>ver</th>
+            % endif
             <th>${_('Time')}</th>
             <th>${_('Author')}</th>
             <th>${_('Commit')}</th>
@@ -30,6 +33,11 @@
             class="compare_select"
             style="${'display: none' if c.collapse_all_commits else ''}"
         >
+            % if hasattr(c, 'commit_versions'):
+                <td class="tooltip" title="${_('Pull request version this commit was introduced')}">
+                    <code>${('v{}'.format(c.commit_versions[commit.raw_id][0]) if c.commit_versions[commit.raw_id] else 'latest')}</code>
+                </td>
+            % endif
             <td class="td-time">
                 ${h.age_component(commit.date)}
             </td>