You might be correct!
But still this amp is under rated and it's true power at 13.5V:
2 x 102 watts @ 4 ohms
1 x 342 watt @ bridged at 4 ohms
Source: http://amp-performance.de/431-Rockford-Fosgate-Punch-250-2.html
At 14.4V it should do around 390 RMS!
One hell of a engineering marvel! This amp is used at 2 ohm bridge in competitions but not recommended for daily use as this will greatly reduce the life of this amp!