The 2011 Toyota Sienna is available as a 4-door, 7-seat passenger van. Starting at $31,930, the 2011 Toyota Sienna LE AWD V6 is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2011ToyotaSiennaXLE V6 Auto Access Seat FWD , priced at $ 40,245 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway.