As minivans go the Sienna is a sensible choice, but it isn't very engaging to drive. The Sienna rides very comfortably and it is quiet inside, but handling is lackluster. The 3.5-liter V6 is lively and returned a respectable 20 mpg overall in our tests with the six-speed automatic. The all-wheel-drive version--the only such minivan on the market--sacrifices just 1 mpg. An eighth seat cleverly stores in the back when it isn't installed in place. That update also brought a standard backup camera, an additional LATCH attachment, and a front-passenger seat-cushion airbag. Reliability has been above average. That and the availability of all-wheel drive are the Sienna's biggest advantages over the Honda Odyssey. 2017 brings an eight-speed automatic and additional horsepower.