The Tesla Roadster with battery upgrade https://shop.teslamotors.com/products/roadster-3-0-upgrade https://shop.teslamotors.com/products/roadster-3-0-upgrade is

The Tesla Roadster with battery upgrade https://shop.teslamotors.com/products/roadster-3-0-upgrade https://shop.teslamotors.com/products/roadster-3-0-upgrade is rated at 340m. This is probably a fairer comparison. The DIY car posted here still wins on range, but by 12% versus Roadster instead of 38% versus Model S. It massively wins on price ($13K DYI BMW, not counting labor; versus ~$70K for a used Roadster + battery upgrade), and loses on safety. [The Roadster is not as safe as the Model S and hasn't been crash-tested, but is presumably safer than this thing.]