I am having a hard time putting the numbers together when comparing the Roadster to other vehicles. I was using the new General Motors 7.0liter LS7 engine found in the new Corvette Z06. Here are the specs:
LS7 - 505hp (373kW) @ 6200rpm, 475lb-ft (644Nm) @ 4800rpm, 3130lbs, 0-60 in ~4sec, 180mph...