Is there any oil or coolant in it?
Seizure is rare, they either knock the bottom ends and throw a rod through the block or snap the cambelt. In the first case you would have a big oil slick, in the second case it would still turn on the starter.
I suppose it could seize if it overheated though.
I would say you do have comeback, as a used car generally has to be fit for purpose unless sold as spares or repairs.
I would contact the dealer and either ask them to fix it or refund your money. If not see the CAB.
Fixing a seized engine will normally mean a new/used engine.
Giulietta 2.0JTDm (170)
Last edited by symon; 15-01-10 at 20:30.