The stock Gallardo has about the same acceleration as a stock Gen II Viper. And perhaps for the first time in Lamborghini's history, Audi's engineering influence makes the Gallardo more likely to be a car that you could actually drive regularly like a Z06 or Porsche Turbo.
But like the Ferrari 360, most owners are going to rarely drive them, as depreciation is going to take a bite in resale values after the initial high demand is met. And as mentioned, high maintenance costs will follow the car all of it's days.
The Gallardos don't have a ton of torque, so unless you are in the right gear (to be up on the powerband), you might be in trouble.
MbnViper,
Do you really need to ask how the Murcielago will do against your S/C Viper? A blown Viper
can easily out accelerate a Murcielago with it's measley sport exhaust bolted on.
But ultimately it will likely come down to getting traction in the Viper.
Both the Gallardo and Murci have AWD, which means that they can effectively put down all of their power, but the cost is in drivetrain power losses and extra weight.
A stock Murcielago has about the same acceleration as the SRT-10 Viper. But S/C Gen II Viper has about a 150HP/250TQ power, AND 300lb weight advantage over the Murcielago.
So from a rolling start, it will be over quickly with the Viper pulling on the Murcielago as strongly as an Ferrari Enzo.
But if you sit in your Viper and spin your tires (which is not hard with all of that torque)
then the Murcielago will get the lead from a standing start, and you will have to reel him in.
If you can ask the question, then the money differential probably doesn't mean too much, but other than being the latest cool toy on the block, I don't see a great reason to pay an extra $100K for the exotic Italian nameplate.
But passion and image drives these kinds of purchases more than performance specs do.
-Dean.