I think it's an error in Honda's website. Perhaps it pulled a few dimensions from the 2005 Civic Hybrid? If I look under the 2006 Hybrid rather than the "compare" feature - the overall length of the HCH II is 176.7", weight 2875lbs and width 69.0".... exactally what the "EX" is listed at. On Edumunds.com, the 2005 HCH I is listed with a length of 175.4 and width of 67.5 - the same as the link you provided. Looks like Honda mixed and matched 2005 and 2006 data...

Eric