In this video, Road Record's Maggie Barry takes the BMW i3 REx for a range test around Scotland.

The idea is that she'll drive it continuously without recharging or refueling to see how far the i3 REx can travel.

The end result is unclear or at least imprecise, but Barry seems to be implying that through knowledgeable use (knowing when to turn it on, which is not driver selectable in the US) of the REx and range-saving driving techniques, 170 miles of continuous driving range is possible in the i3 REx.

After those 170 miles, you'll either have to recharge, refuel or both.