...here are the 'target' vehicle specifications that EPA/GM specified in one of their reports(*) about alternative-fuel vehicles:
Vehicle Acceleration, 0-30 mph.......................4 sec
Vehicle Acceleration, 0-60 mph.......................10 sec
Vehicle Acceleration in Top Gear, 50-80 mph.....20 sec
Maximum Vehicle Acceleration.........................5 meters-per-second^2
Time to Maximum Acceleration........................1 sec
Vehicle Gradeability at 55 mph for 20 minutes....6% grade
Top Vehicle Speed........................................110 mph
(*) source:
http://www.epa.gov/nrmrl/std/fuelcel...esentation.ppt