The air this month is positively electric, literally.

Throughout November, WardsAuto editors have driven seven electrified powertrains as part of the 2015 Ward’s 10 Best Engines competition. That includes the hydrogen-powered Hyundai Tucson fuel-cell vehicle, Lexus NX 300h hybrid, Fiat 500e, Kia Soul EV and Volkswagen e-Golf, as well as all-electric and extended-range versions of the BMW i3.

Let’s focus now on the compact-class EVs and the range-extender, as they are closely aligned in terms of packaging, capability and overall performance. The staff has warmly received all of these EVs.

Acceleration in general is brisk enough to keep up with most traffic on Detroit freeways, and brake pedal feel has been nicely feathered to imitate that of a conventional vehicle, while still providing regenerative juice back to the battery, to help extend range.

On that front, the standout is the i3 EV or EREV, which has such aggressive brake regeneration that the car can be driven with only one pedal, no fooling. Cruise along at a steady speed, lift off the accelerator as a traffic light approaches and the i3 will stop all by itself.

Some drivers may not like it at first but soon will learn how to gradually lift off the accelerator to avoid abrupt stopping. Truly, the brake pedal only is necessary for emergencies.

As we evaluate the EVs, we find each one shines in a particular area: The 500e is the cheapest ($31,800). The Soul makes the most torque (210 lb.-ft. [285 Nm]) and delivers the longest battery-only range (93 miles [150 km]). Until the Soul came along, the 500e offered best-in-class range (87 miles [140 km]) among our tested vehicles.

The i3 is the most expensive ($41,350) but reasonably priced relative to other BMWs. And it makes the most power (170 hp), is the lightest (2,860 lbs. [1,297 kg]), sprints to 60 mph (97 km/h) the fastest (7 seconds or 7.8 seconds with range extender) and charges in the shortest time (three hours at 240V).