Key drew comparisons between rallying and golf, in regards to both sports' pursuit of government support to secure international events in New Zealand.
"Realistically, there's a lot of different criteria there - [including] what is likely to be the worldwide reach of what you're doing. And that's one of the reasons why golf's had money, because it gets a big audience from people that watch it.
"World rallying is the same - they probably get 100 million people at some of these events. So it's huge numbers."
Key was quick to affirm his appreciation for New Zealand's motorsport sector, having spent the night listening to a variety of other speakers from a variety of different eras in the sport - labelling the night "unbelievable".
"I had the opportunity to sit with Scott Dixon, which was remarkable. He's just a fantastic athlete, and what it shows is that these guys [do] - they're not just driving cars. It's keeping up your peak level of fitness," he said.
"I think if you just look at just the legends of speed that they had up there tonight, you can see the breadth and depth of New Zealand driving - not obviously just rallying, [but] across a whole range of different categories.
"It's sort of been the secret of New Zealand's success really; the capacity to deliver a lot of drivers in a world where fundamentally it takes a lot of cash, and we don't always have the sponsorship to support them.
"It just shows you that they're getting there almost in spite of their ability to not be funded in the way that you expect other drivers to be funded."
The Rally New Zealand title will once again be up for grabs next season when it becomes part of the 2017 Brian Grean Property Group New Zealand Rally Championship calendar - organizers hoping to use the event to test the waters for a 2018 WRC return.