jb 
2008 Toyota Sienna Minivan Limited 7-Passenger 4dr Minivan (3.5L 6cyl 5A)
One step forward, two steps back
 We just traded our 06 Sienna ltd. for a new 08. Features are identical. Great design, drives like a dream and fuel economy is very reasonable for the size. BUT, Toyota put a new engine in the Sienna in 2007. I guess it does get 1 mpg better and has better horsepower. But, the noise and vibration from the new engine is a major disappointment. The last one had such a smooth power plant; this one is not of the quality of the 2006. If you are in the market, you might be more satisfied withe the previous generation Sienna. We have had the Chryslers and the Honda. Toyota nailed the design and utility of the minivan in the Sienna. 