Comparison between the R-Rated VHS released by MGM and the uncut Unrated DVD released by MGM.
There are 2 alternative scenes with an overall runtime of 27 seconds.
Besides the uncut Unrated DVD by MGM, there also exists a slightly censored R-Rated VHS tape. The censorship of this US release happens during a sex scene on TV and especially during the rape scene of Francis and Sarah.
When Francis watches video footage of Sarah's wild party orgies, you see her having sex with another guy. In the R-Rated version the guy just pulls her hair and thus her head upwards.
No difference in time.
When Francis rapes Sarah, the Unrated version of it is much longer. Again, the R-Rated version shows some alternative footage.
R-Rated: 35 sec
Unrated: 62 sec