thats a pretty poor range... i would be asking why so low when the ev1 had 260km
-edit-
The top speed has also been increased on the Volt, from 80 miles per hour (130 km/h) to 120 miles per hour (190 km/h). The battery pack size has also been reduced between the two, from about 300 L in volume in the EV1, to just 100 L in the Volt.
volt wiki
http://en.wikipedia.org/wiki/Chevrolet_Volt