Google ackermann principle

 

see also official bulletin from Alfa :

 

Cheers guys - I had heard that it was the Ackermann Angle and grateful that you have confirmed it to be so, and the bulletin is good to have had a read of 👍👍

 

Weird thing is, I get it on our Giulia but not on our Stelvio

 

different tires perhaps

 

I used to get it on the 2017 Giulia, but thought the new Stelvios had done away with it. My MY21 Stelvio has the same characteristics. Tight lock generates the same sound but I thought Alfa had given up on Ackemann geometry due to customer complaints (lack of technical knowledge) last year?

 

I thought Alfa had given up on Ackemann geometry due to customer complaints (lack of technical knowledge) last year?

I think that’s a myth. It was only mentioned once by a dealer who needed to make a case to @Multo Bene that his my21 giulia QV steering he hated was as expected. I think it was a fib.
Qv owners of my20/21 still have skipping on summer oem tyres. Other models would probably only not experience it because they might be on comfort focused softer compound tyres from factory.

 

its a really strange noise like your car has knobbly tyres when you obviously don't on full lock!

 

My wifes A Class suffers from the same thing....pretty embarrassing in a multi story or anywhere else with a shinyish floor....makes you sound like a hooligan screeching about!! But its only happening a very low speeds.

 

All cars have the Ackerman effect (its need to compensate for the fact that on a corner the inside wheel needs to make a tighter circle than the outside one......turn ANY car to full lock on one side and the inner wheel will have turned further than the outer....that Ackerman geometry in effect)...but the reason its more noticeable on some cars inc the Giulia and Stelvio is the acute Ackerman angles employed to enhance driving experience. A price worth paying though.

 

You will also notice it more in the colder ambient temperatures as the rubber tyres aren't as compliant when warm!

 

Absolutely!