this is my previous post on minivan

minivans are quite different on chassis: american vans and Sienna are Van bases (torsion bars for rear suspension): Ody is based on trucks (so not as comfortable and quiet) and it's 4-wheel independent suspension and handles great; Quest and Hyundai's minivan are based on sedan (Altima)with 4 wheel independent suspensions (drives and handles great).

Quest's engine is the best in the class and it typically lasts long.