Toyota's Sienna minivan returns for 2013, the third year of its latest generation, with one major change: The base four-cylinder engine has been dropped, which means the only engine available is the 3 ...

Much like the changes to the 2013 Sequoia, the 2013 Toyota Sienna drops its base motor -- in this case, the 2.7-liter I-4 -- and moves to an all V-6 lineup. While this move seems to fly in the face of ...