In Opinew you can link products into groups and those products will share reviews with each other.
If you have a blue car and a red car and link them, when somebody leaves a review on the blue car, that review will also appear on the red car (and vice versa). The same goes for imported reviews.
Step 1: Head over to “More > Link Products“
Step 2: Press the “Create a group” button
Step 3: Add a name in the “Group name” field
Step 4: Select the products you want to group from the list displayed
Step 5: Finally, press the “Create” button.