This is @pitasmum 's husband's Pork Pie mini replica. (Have a look at yesterday's photo for full explanation). Anyway - as the mini in the film was being crazily driven the length of NZ, they sold off bits of the body - hence the way this mini looks - even the petrol can that features in the movie is in the boot!
Here's the link to the movie trailer https://www.youtube.com/watch?v=jMY1Mhc_4jc
And as the boys (too polite to call them two old farts!) were scrambling out of the car at Pokeno, they were moaning about how hot it was - the perspex doors had no windows!!