At A156, you have to careful with lap times, particularily at the Ring where manufactures and testers drive the cars. Manufacturer tested cars are usually much faster. For example, the 430 Scuderia. It ran about 7:40. The ACR ran 7:22, but both cars are equally fast (the 430 might even be faster with better downforce/weight ratio and less drag). There's also the Zonda F which I am certain will kill the two car ahead of it.
Then you have to take into account that cars are run on different days, and that potentially makes a huge difference. The only time it's really safe to directly compare lap times is when there is a huge number of laps on the same track and/or the laps were done on the same day in the same test.