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There is an inconsistency in the Volt's peak hp rating.

The Peak power specification at http://gm-volt.com/full-specifications/
lists the Peak power as 130 to 140 kW (nominally 182 hp). It is claimed at some other sites http://www.nationalpost.com/life/driving/story.html?id=436590 and http://www.financialpost.com/reports/story.html?id=436590 that the peak torque has been increased to 273 lbf ft. The EV-1 and Tesla motor maintained peak torque out to 6500 RPM and 7100 RPM, respectively. If we assume the Volt maintains torque out to 6000 RPM, this gives a peak hp of 312 hp! This hp corresponds to a power of 320 volt x 726 A.
The A123 Systems battery pack seems to be capable (m1 cell of 70A peak x 20 in parallel = 1400 A) of this current.

BillR in the forum http://gm-volt.com/forum/showthread.php?t=252 using an estimate of a constant torque out to 4000 RPM got 208 hp.

Anyone have any thoughts or information on this?
 

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I don't think official numbers are known yet. Everything that has been thrown out there yet are just estimates or guesses. When I talked to the folks at Volt Nation, they said they were still "sizing" motors to the car and my guess that it may all change when they get to the real Volt test mules after the Malibu mules they're running now. So who really knows? I'd love to know too.
 
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