Originally Posted by Ironfish653

This went around on ADVrider once upon a time, IIRC it has to do with the EU/AUS requirements for trailers to have braking systems on much smaller trailers, that in the US are typically un-braked. So the 'EU' version of a car has a higher tow rating because EU trailers require less of the tow vehicle (and are typically towed at lower speeds)...