The tied roast pictured in an earlier post above is actually two loins tied together.
The first picture below is of two pork tenderloins on the cuttingboard. A whole tenderloin will weigh between a pound and a pound and a half.
The second picture is of a pork loin. Two of these were tied together to make the roast in the earlier post.
The loin will have fat on it while the tenderloin will have silverskin.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan