Paul/Ruth, be aware that although the PT has a relatively high kerbweight (around 1600kgs), the manufacturers maximum towing weight is low (about 1000kgs from memory). The problem with American cars is that in the US if you want to tow anything bigger than a jet-ski, you use the 4x4/pick-up (as most households have one!!!), which are usually rated as being suitable to tow a small country!!!! Consequently, smaller family cars are only given low tow ratings. It doesn't necessarily mean that the design of the car isn't capable of more, but that is all the manufacturers thought anyone would want to tow with it. Unfortunately the max. tow limit by the manufacturer is the max. you can tow by law.
Interestingly, PC had a PT featured this month and it lists the kerbweight as being over 2000kgs and a 3000kgs towing limit, which I am sure is a spelling mistake!!