Worth noting that UDDS is a lower-speed urban test cycle, so it doesn't test aerodynamics much, but it does heavily test rolling drag (whether it's caused by weight, bearing drag, brake drag, motor drag, tire rolling resistance, or even things like suspension settings inducing extra tire drag) as well as electrical and drivetrain efficiency (the efficiency of deploying and regenning power, as well as just steady-state loads) of an EV.
Extrapolating purely from UDDS to EPA range won't cover the effects of aerodynamics significantly, and therefore will be inaccurate when an aerodynamic but otherwise inefficient car gets a poor UDDS score (EPA will be better than expected), or an unaerodynamic but otherwise efficient car gets a good UDDS score (EPA will be worse than expected).
Although with a UDDS score
that bad, I'm not expecting good results from EPA. And, it
does extrapolate decently well to EPA
city ratings, just not combined/highway. For comparison with another VAG EV, the e-tron 55 quattro
gets 277.55 miles. I would expect the Taycans to get a similar EPA city range to that vehicle, but better EPA combined due to better aerodynamics.