I'm going to buy that magazine and have a look at who the other contenders were. They do have a very specific (and published) selection criteria (and no it isn't 'It has to be a Ford or Holden")

I suspected the Commodore would win, Every new shape Commodore to debut has taken the prize..

I actually don't think it's bias 'cause it conforms to their way of thinking...
as in it stacks up against their list of selection criteria, Much in the way that a 40 year old engineer probably wouldn't be selected for a job at McDonalds...