This article has a few
This article has a few problems.
1.9 gallons not 2.3 gallons. 2.4 gallons for other countries i believe.
i3 has multilink rear suspension version cheaper torsion beam rear suspension for the Volt.
The speed is not limited when using the Rex. You do have a bit of a buffer because the engine kicks on at about 6% SOC. If you are on it for too long of course the car will limit performance but there shouldn't any limitation until it drops down.