The minivan moves in and out of popularity faster than the latest diet craze. With many people moving away from their full-size SUVs, yet still needing room for the family, the minivan is once again in vogue and the Toyota Sienna is one of the more attractive prospects currently available. The Sienna surpasses the Dodge Grand Caravan in standard horsepower, comfort and conveniences, offering such features as all-wheel drive and retractable side windows. The Sienna is the near-equal of the Honda Odyssey and Nissan Quest, falling a few digits behind these rivals in interior room, horsepower and resale value.