to make it even simpler, and to answer GTR-Lux's perfectly VALID question, to kill an Enzo takes:
1) Superior driving skill.
Pretty simple, isn't it?
You might want to add:
2) A Skyline GT-R, tuned to 800bhp. And toss on some coilovers
addendum to 2): If you are a highly skilled driver, 600bhp should suffice. If you are Schumacher, or even Rossi, a GT-SS turboed GT-R will be enough.
That's the real world. No limits except the driver. And no to$$er who lacks real-world experience with supercars has even the remote right to preach, let alone make authoritative statements about said cars.
btw, regarding the real world, we seemed to have omitted a car that is very dangerous to toy with. An SLR I've been able to nose out. But a Mercedes Benz SL65 AMG with a hot driver - I've seen that car perform to where any car should watch their P's and Q's before taking it on. In the real world. Magazines may not give the car huge numbers, but it is incredibly fast on boulevards. If I had to choose between an SLR and the SL65, I'd take the latter in a heartbeat. Twin turbo V12? 22 pounds of boost? That's a car to respect at the stoplights while idling in your GT-R.