Hyundai Eon The Eon is powered by a 814cc, 3-cylinder petrol engine which produces 55 BHP and 76.5 Nm. This is the Santro engine minus one cylinder. Besides the petrol version, the company also offers Eon LPG variants on D-Lite plus, Era plus and Magna Plus. All these variants also deliver similar amount of power and torque accompanied with the mileage that would give other cars a run for their money. Hyundai Eon is very fuel efficient car with ARAI certified mileage of 21.1 kmpl, which is again best-in-its-class.