Aston Martin a close second, Mercedes third.
A bizarre storm forced officials to place the session under a red flag.
A look at the Audis after the first day of Bathurst 12 Hour practice.
The first free practice session on the Yas Marina Circuit saw the Avelon Formula Wolf CN2 prototypes setting fast times.
The increased competition of this years’ field was in evidence with the top ten cars covered by just 1.7 seconds across Friday's three sessions.