From the website: "[...] the ability to zip for 265 miles (426 km) on one charge —that's the equivalent of 89 m.p.g. (2.6 L/100 km)" I have a hard time figuri

From the website: "[...] the ability to zip for 265 miles (426 km) on one charge —that's the equivalent of 89 m.p.g. (2.6 L/100 km)" I have a hard time figuring out how on earth did they calculate that. My (european) Ford Focus is not a very efficient car by our standars, yet it runs some ~700km on a single tank. Oh, it consumes between 7-8 L/100km by the way. Can anyone tell me how they came up with those numbers above?