BMW i3 Electric Vehicle Gets Optional Range-Extending Gasoline Engine
This concept is similar to what is employed in the Cadillac ELR and Chevrolet Volt. However, the BMW i3's range-extending engine is much smaller than the Cadillac's and the Chevy's, a 650cc 2-cylinder that makes 34 horsepower and has a 2.4-gallon fuel tank. The BMW's range-extending gasoline engine serves solely as a backup generator, able to double the i3's range to 160-250 miles, depending on where and how the car is driven. Theoretically, this means a BMW i3 could be driven from Los Angeles to New York without recharging the battery.
When the BMW i3 goes on sale in the second quarter of 2014, the range-extended gasoline engine option will cost $3,850 and add 330 pounds to the car's curb weight.