All of the 0-60 times are misleading at best. Did they start in second gear or shift it down to first? What about the Road and Track car test in March 1994 by "experts" that records the 560 at 0-60 in 6.8 sec. I have seen 6.8, 7.4, 7.8, and 8.0 second recorded test times by different sources. The 560 is not a high 7 or 8 sec car. My opinion.
6.8 is pretty quick, but it is a 5.6 liter and I believe terribly underrated for marketing and insurance reasons. Remember the time that it was introduced, it was not popular to rave about the horsepower. Heck, look at what gear they are running in the back.
Check the link for the article.
BDBENZ
http://home.hiwaay.net/~gbf/107/rt.html