According to Motorhome Magazine, and their 2008 dinghy roundup, there are a lot of new vehicles that are ready to be towed behind a motorhome without having any special modifications done to the drivetrain of the toad / dinghy. Technically, any vehicle can be towed behind a motorhome but may require modifications to avoid damage to the drivetrain of your tow car.
Here is a list of the guides offered my Motorhome Mag :
If you’re in the market for a new car to tow, I would strongly suggest taking a look at their list of towable vehicles and make a decision from there.
When choosing your tow vehicle, you need to take a look at the owners manual under “towing”. Most owners manuals will specify if the vehicle can be towed 4 wheels down. If the vehicle is not recommended to be towed flat, the manual should specifically specify exactly this. Even though the manufacturer says flat towing is not allowed, with certain tow vehicle modifications you should be able to tow your vehicle. Companies like www.blueox.com will supply all of the required equipment to prepar your toad.