Engine Moving into the details, Swift Range Extender will be powered by a 658cc petrol motor alongside a 5kwh lithium ion battery. The joint power output would be around 73PS, while the fuel economy of both petrol/electric combined, will be 48.2kmpl. The car can also cover distance of 25.5kms in pure electric mode. And if that’s not enough, then here is another outstanding feature; the Maruti Swift Range Extender can be fully charged using 200 V electric socket in just 90 minutes. Furthermore, the interiors would be quite different from the ongoing model with lots of tech inside. The car weighs just 1600 kgs.