The issue with the Vantage V8 is that it's not that quick or dynamic. A friend of mine has one, the chap I bought my MX5 donor car off actually and we went to a meeting at Brooklands earlier this year. Coming down a private road I have to say my R8 left it like it was parked. It surprise me how much quicker my car was or more to the point how not quick the V8 was. I am not sure which V8 he has, but I think you would feel it slow after the GTR.