Hi @Maky, a simple search using the search function on the top right (magnifying glass symbol) can sometimes lead to very interesting results. I suggest that next time you use it to see if a topic already exists as sometimes a similar query has already been made 
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On the matter, if you search “Aston Martin” you will see that @jcksmith850 kindly shared an analysis that he carried out on Aston Martin, which includes his conclusions:
It may be better to continue the discussion on that thread. I personally have not looked into Aston Martin.