Renowned magazine Consumer Reports has just published a chart featuring the most-fuel efficient cars currently sold in America and previously tested by the magazine. At the top of the pack sits the BMW i3 REx with an overall MPG or eMPG in this case of 139 miles. In second place comes the Mitsubishi i-MiEV SE with 111 MPG followed by the Ford Focus Electric with 107.
Consumer Reports’ overall mileage is calculated from equal portions of city and highway driving. The fuel economy numbers are derived from a precision flow meter and are rounded to the nearest mile per gallon.
In comparison, the US EPA says the BMW i3 BEV has a range of 81 miles with a combined MPGe of 124 (138 MPGe City, 111 MPGe Highway). The US Environmental Protection Agency rates the BMW i3 REx at 72 miles on full electric mode and 39 MPG when using the two cylinder gasoline engine. MPGe combined is 117 and the total range comes to 150 miles.
BMW i3 REx comes with a rear-mounted 650cc, 34 hp, two-cylinder, gasoline- powered Range Extender generator is available, which roughly doubles the vehicle’s range. When the battery gets to a certain level, the Range Extender starts and maintains the battery’s current state of charge.
Here is the full list: