The Sienna, is a large, comfortable van ideal for big families or extended road trips. The popular Toyota Sienna can seat up to eight and haul them in relative quickness, thanks to its 3.5-liter V-6, rated at 266 horsepower. Its engine is one of the smoothest and quietest in its class, the transmission shifts without hesitation, the interior is especially hushed, and the ride is smooth and somewhat soft, though the Sienna maneuvers very well.