Tractor / Topper speed - Stupid question

[phib]

So this being Pistonheads it has to be about speed !!

This is no doubt a stupid question however ....

We have a massey 135 which runs a 6ft topper and gives a good finish to the paddocks ( 14 acres) however it takes ages !!! Usually have it in low 3 or occasionally high 1. Otherwise it boggs down.

So the question is if I buy a bigger tractor will it cut the paddocks faster ? I.e. can I run at more ground speed ?

Phib