.....
Yeah, same as the early SD1. It was square but with heavily rounded corners, if you follow. Certainly not evenly round! .....
The idea behind it was to discourage you from letting the wheel just spin back to centre, and to do the AIM wheel shuffle.
From the same website....
'The Quartic wheel helped alienate customers further, and although Austin quoted sound reasoning behind the choice of such an offbeat item, the truth was people didn't like it – it may have enabled unhindered visibility of the instruments, but unless you were sat in an Allegro 1750 Sports Special, there were never enough dials to fill the binnacle.
Her Majesty's Police force placed an order for 657 Allegros to be used as Metropolitan and Panda cars around the time of the car's launch. The police Allegros replaced the Morris Minor, and in the role of Panda Car, were judged very successful. It was noted by the press Quartic wheels were being removed; It wasn't as if the Quartic wheel was bad, just that it didn't suit the Police way of driving (so it was explained by embarrassed officers). Thankfully, this butt of many jokes lasted less than two years before being consigned to the gimmick bin.'
The IAM shuffle and Police standard steering method - are they not one and the same, if done correctly?