You can carry 2/5 Gallon Jerry Cans of gasoline (or diesel) but carrying 200 miles worth of electricity reserve is an issue.
In America cross country you can travel 500 to 700 miles (up to 1000km) daily -- that takes 10 to 12 hours ... Ft. Worth to El Paso TX is a 600mi/970km haul ... now take a look at that map
the "Texas Autobahn" 140 - 160 km/hr.
For short haul interurban, or urban commutes, electric cars can make sense.
Even when EV autos have 300 - 400 mile ranges they are not practical for some longer haul travel. Apart from that, there are no functional electric utility plants in the Zombie Apocalypse -- you can always scavenge up some gasoline :P
Farmers keep storage tanks of diesel and gasoline ;)