Hi Linda, I'm afraid that the Swift Conqueror is no more, i have recently sold it, and i find myself undecided as to whether to buy another caravan just yet, reason for selling was the total lack of enthusiam from the rest of the family!, i on the other hand still have bags of enthusiam towards the pastime, anyway my Touran was the 105 bhp turbo diesel se spec, the swift had an unladen weight of 1345kg's and was certainly up to at least 1500kg when used,if not possibly more! the maximum legal towable weight for this car is 1500kg's. On a weight bridge with me in it, the car's total kerb weight was 1725kg's.
The performance i found quite adequate, and on the motor way especially down through France this year it would hold 60-65mph quite happily in 6th gear, and would only need 4th on the real steep inclines, average fuel consumption with caravan 3 teenage children and two adults was around 32mpg ish, stability excellent at all times.
Basically i found this car a general good allrounder, i also tow a 5.5m twin engined rib on a single axle trailer, and although the whole outfit only weights around 700kg's performance isn't far different to when towing the caravan.
Hope this is of some help.
Regards Paul.