As historical records at the Auckland Museum show, when car horns last made an arrrooga! sound, petrol in the city was being given away free with purchases of BP’s Wild Bean coffee and Paul Holmes was hosting a nightly TV show. How times have changed. But why spoil an eye-catching headline for the sake of historical accuracy? It was the sound of the road before honking your horn became gratuitous, petulant and aggressive. These days, that stately arrrooga! has mutated into a two-tone, attention-seeking parp! — or, while driving in downtown Auckland, add about 49 ‘a’s to that. More…