If nothing is wrong with F1 GTR it should atleast do 1:22s.But again it was in the slower configuration where it averaged 182km/h while best GT3 averages 169km/h.And that configuration was around 5s slower in terms of rfactor lap so it should do around 1:18s.
Edit fastest lap record was broken to be 1:26.897,still no closer.
Wrong the test date for R8 LMS Ultra was 20th December,for F1 GTR was 19th december(fastest lap some days ago) so it was laser scanned track.
@lalyrn
Talking about assists,I did 6:10.981 with F1 GTR 95 in GT6without assists but 6:10.962 with assists and that too because it is a long track in shorter tracks like spa I am around 2s faster without assists.I did 2:18 without assists and 2:22 with assists with R8 LMS Ultra GT3.
By the end of the day I think F1 GTR in GT6(but with SH tires) is more accurate than AC.