IIRC, it uses the old twin-turbo straight 6 used in the previous 335i, not the new single twin-scroll turbo.
In fact the SV was quite good on the track. Awesome power on the straight and corners well! Just not as sharp as the Scuderia. But overall still very fun! Mid 2.30s even not pushed really hard, car still 'running in'.
Great that you manage to see it in the flesh! I remembered you asked me, but didnt have time to log in here.
Bro, I feel you should just buy the Countach that we saw in KL if you want a nice classic sports car! No need to worry about paying tax, coe, etc. Can drive anytime you feel like!