Hi Rob,
Probably me!
The 140 is a fine towcar, but you just have to work harder.
The 130 Sport (now the other halfs runabout) has lower gearing, and the torque comes in stronger and earlier so its far easier to get off the line.
The 130 is also happier pulling in 6th with the van on, and if you lose a few revs a drop to 5th regains momentum, wheras the new one will require you to drop a couple of gears to regain the lost speed.
The 130 is also a good 3 to 5 mpg better towing.
I will always use the new one for towing as:-
a) Its newer
b) Its a company car
c) I don`t pay for any fuel used ( except abroad )
That doesn`t make it `better` though, only preferable!