Topspeed:
We may see a big difference in performance when the C8 Z06 and ZR1 are revealed, comparing to C7 variants.
Seems as though the C8 Z06 is rumored to have 5.5L Flat-plane crank with high redline. I have seen rumors of NA (not much more than 600hp compared to 650hp in the C7 Z06) and also Twin-turbo 5.5L V8 (which would be used on ZR1 for sure, but not sure about Z06).
If the C8 Z06 stays with 5.5L NA, then I'm not sure how much faster it will be than C7 version, but should be great to drive. Will depend on how much weight they can lose and how much Aero they can add.
With the ZR1, this should have huge power, AWD, and hybrid (similar to 918 layout).
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi