The first generation (2004-2006) Scion xA and xB share identical drivetrains (engines, transmissions, axle widths, final drive ratios), and they weigh essentially the same. The xA has a cD of .31 and is .3" narrower and 4" shorter for a cDA of 7.00 v. the xB's cD of .35 and cDA of 8.46. The EPA estimates C/H/Co of 27/34/30 for the xA, and 26/30/28 for the xB.
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