"We're going to benefit because we're going to use it, but for 51 weeks of the year New Zealand motorsport is going to be the big winner."
It has been suggested that Hampton Downs would have been a better place to hold the annual race.
But for Cochrane, that proposal didn't stack up after close examination.
"We've had meetings and meetings and meetings with Hampton Downs where they've said things would get sorted but nothing has been," he said.
"The resource consent allows 20,000 people at the track a day and I have spoken to the head of the New Zealand Transport Agency in charge of highways and they told me 'we are not going to change that and we will fight that tooth and nail because the crowd will absolutely block up our main artery in and out of Auckland'."
It's been Driven's understanding that Hampton Downs would be able to increase its daily spectator total if changes were made to its exit and entry ramps.
"I find [Cochrane's] comment a bit strange as I have a memorandum of understanding from the NZTA that they will do everything to support us," said Roberts.
But Cochrane defended the Pukekohe decision.
"All due diligence was done with the Ministry of Economic Development, Auckland Tourism Events and Economic Development and V8 Supercars," he said.
"We all did our own research including computer modelling by external firms and we all came up with the same solution - and that was to do up Pukekohe."