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 top speed. Tesla - 248hp (185kW) @ 8000rpm, 190lb-ft (258Nm) @ 2500rpm, ~2500lbs, 0-60 in 3.9sec, 130mph top speed. So the Roadster has 49% of the horsepower and 40% of the torque, only weighs 600lbs less, yet can still outperform the Vette. I guess that is because the Roadster has the max torque available right off the line, while the Vette has to build up the torque. I'd like to see what their 1/4 mile numbers are like. Bob Bressler did have this so say in the recent TeslaMotors blog entry: "More interesting, I think, is how it compares with the Callaway Corvette I used to drive. The Tesla’s acceleration feels just as fast but at the same time the Tesla feels light and nimble where the Callaway felt heavy and awkward." Anyone have any thoughts on comparing the performance of ICEs and AC motors? I've also been thinking about this in a marine environment, i.e. AC motor-powered boats.