The US legal version of the McLaren F1 (federalized by AmeriTech) didn't fare nearly so well. It only did 11.6@125 mph in the 1/4 mile and top end of 217 mph bouncing off the rev limiter (why was the gearing changed?), so apparently becoming US-legal took quite a bit of its thunder. Top speed in the 200++ mph range is all about bragging rights anyway, not whether or not you have a good sports car/track car. Apparently the handling of the McLaren didn't really match up to its straighline capabilities. Give me an Enzo any day.
The Mclaren gearing wasn't changed, the rev limiter was removed from the car that did the 241 mph top speed run.
Well Road & Track didn't indicate that the revs were less than the 7500 rpm redline, although that may have been the case. Regardless, that McLaren was down 13 mph in trap speed, it clearly lost something from the Euro model. And if tested again today as it was then, it would have NOTHING for the Enzo in accel.
The McLaren in R&D was detuned to meet US regulations, so it has less power. As for the rev limit of top speed, yes the rev limit was disabled for the 240mph top speed run, but in prior testing at Nardo (not straight with banked corner so maximum top speed tends to be lower) it recorded 231mph or about 370kmh and this was with a prototype engine with "just" 585hp, instead of the 627hp in the final version, so with or without rev limit, the McLaren can go faster than enzo. As for acceleration, physics really can't lie with the figures of power, torque and weight. Enzo will accelerate quicker off the line due to electronic controlled start giving superior traction, but once rolling, McLaren will outaccelerate the enzo, espeically at higher speed where drag will also come into the equation.
The Enzo and the Veyron are two difficult cars to compare. The Enzo is a race car with a license plate and airbags and the Veyron is a grand touring automobile, it is a car that is very focused on luxury and power. The Enzo is not, and Ferrari itself will never be about power, always about motor sport and cars meant to be driven hard in technical environments, such as the Ring, Monza, Fiorano, Silverstone, Monaco, Le Sarthe, not between stoplights. Every ounce that a car possesses makes it harder to accelerate, decelerate, and corner, plus, it has harsh effects upon weight transfer and traction at certain times under heavy lateral physical load. The Veyron, being 4300 pounds, yes, that’s 1300 pounds on the Enzo, with 340 more horsepower, it will destroy anything in a straight line, but is no match for an Enzo on a real racetrack, not a BS oval, but something like Road America or Laguna Seca. The Enzo has so many tricks up its sleeve that you would have to really drive an Enzo to realize its full potential. Things like electronically auto-adjusting shocks where a servo is linked to the external nitrogen reservoirs to keep the car extremely level during cornering, a continually changing aero profile and enormous brakes help the Enzo too. So, when Bugatti can build a drivers car, not a luxury cruiser for panzies with too much money and not enough appreciation for true motor sport engineering, Bugatti won’t be able to touch an Enzo. Now to not get too far off topic, I will say that the Mclaren F1 is, and will always be one of the automotive industries greatest engineering feats.