I mentioned the EV only as an indication that there is market interest in an Elio EV or somebody will retrofit an Elio to electric and it will be high performance.Turbochargers do generally improve the engine efficiency, which is part of how they produce more power. The issue is that overall vehicle efficiency depends heavily on how it is driven and how well matched the engine, transmission and rest of the vehicle are. When you add a turbo to an existing vehicle, the engine torque curve is not going to match the gearing as well. And then there's the lead foot effect ...
Rick, where did you get the 4.5sec 0-60 time for an EV Elio? I didn't think they had even looked at EV other than just the notion that they might consider it later.
Anyway, EVs can feel quick because they produce maximum torque at just above zero rpm. It'll depend on the exact motor specs and gearing whether it'll actually end up faster in 0-60, though.