Quote:
Originally Posted by Hersbird
Interesting, I didn't know it wasn't just a function of a straight multiplication of the size. There must be a precise formula based on wind tunnel results. It also may be completely dependent on speeds. What's good for a jet at 600 mph is not necessarily the best for a car at 60 mph. It's hard to argue with the 250 mpg results of the XL1. That just plain blows away any other production car ever.
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"250mpg" is very much like how the Chevy Volt gets "106mpg" (e). As I understand it, once the XL1 is fully on diesel it's a still-impressive "up to 120mpg US" as per the very generous European cycle. Under this same testing regime the 3rd gen Prius is rated for around 60mpg, around 20% higher than EPA.
Had it been sold in the US you might expect the XL1 to get an EPA combined fuel economy rating right around 100mpg once it's not running on electricity.