# VW built a 323 MPGe EV and drove it 794 miles

> Volkswagen's Mission Efficiency prototype crossed Europe on one charge stop, and the compromises to get there are the interesting part.
- Title: VW built a 323 MPGe EV and drove it 794 miles · TechCrunch
- Summary: Volkswagen's Mission Efficiency prototype crossed Europe on one charge stop, and the compromises to get there are the interesting part. Extreme EV efficiency…
- Keywords: electric vehicles, volkswagen, aerodynamics, efficiency, prototypes, technology, startups, built, 323, MPGe, drove, 794
- Source: TechCrunch — https://techcrunch.com/2026/09/14/volkswagens-crazy-efficient-ev-borrows-an-idea-from-slate
- Author: Tim De Chant
- Published: 2026-09-14T17:41:20+00:00
- Read time: 2 min
- Topics: electric vehicles, volkswagen, aerodynamics, efficiency, prototypes, technology, startups
## A concept that actually drove
Volkswagen unveiled a prototype EV rated at the equivalent of 323 miles per gallon in ideal conditions, then did the unusual thing and built it.
## Wolfsburg to Vienna, one charge
The Mission Efficiency covered 794 miles from Wolfsburg to Vienna with a single charging stop, arriving with 104 miles left. That works out to about 279 MPGe in the real world.
## Near production, not fantasy
The teardrop body runs the electric motor and battery from the ID. Polo, parts VW already makes. That is what earns it the "near production" label.
## Twice as good as the best
Back-of-envelope math gets over 400 miles from a 54.9 kWh pack. Lucid's Air Pure needs 84 kWh for 420 miles, though it is a far bigger and more usable car.
## The roof pays the bill
The roofline peaks over the driver's head and drops away fast, a Kammback shape. Drag coefficient lands at 0.158 with a frontal area of just 2.08 square meters.
## Back seats for small people
That tapering roof makes it a 2+2. VW says the rear bench suits anyone under 5-foot-3, and pitches it as a car for a young family of four.

> The prototype was designed so that it could theoretically be used by a young family of four
## Tight wheels, rough ride
Wheels and tires cause a quarter to a third of aero drag, so designers squeezed the gap between arches and front tires. Less room for the shocks to work means bumps get through.
## Mirrors stay, solar helps a little
Cameras would cut drag but lose depth perception, so real mirrors survived. Roof and trunk solar cells add only 18 miles, and only on flat sunny roads at a steady 42 mph.
## A dashboard borrowed from Slate
No infotainment, no built-in speakers. Like Slate Auto's bare-bones pickup, you get a portable Bluetooth speaker and bring your own devices. VW built 250 XL1s last decade, so production is not impossible.
## Key takeaway

Extreme EV efficiency is mostly an aerodynamics problem, and the price is paid in back seats, ride quality, and dashboard features.