Probably depend on your driving style bud.
I drove a 90bhp Citroen Relay with 1000l in the back for a couple of years. Went through 3 engines!
It was slow as you like even empty!
Don't think I got to 70mph once.
If you're a bit more if a plodder (no offence meant) I'm sure you'll be fine.
If you drive like The Stig-perhaps you will be found wanting.
When money becomes no object I shall be purchasing the 180 T32.
Won't be for a few years though I'm sure.