Hyundai presented the LPI Hybrid at the 2009 Seoul Motor Show, and sales began as the Avante "LPI Hybrid" in the South Korean market in July 2009.
The LPI Hybrid (liquefied gasolineeum injected) is a mild hybrid and is the world's first hybrid electric vehicle to be powered by an internal combustion engine built to run on liquefied petroleum gas (LPG) as a fuel.
Hyundai developed the technology and all key components in the LPI Hybrid, together with its local partners including the electric motor, battery and low DC/DC converter.
The lithium-ion polymer batteries, which the LPI Hybrid was the first hybrid to adopt, differed from lithium-ion batteries, using a claimedly more stable and fire-resistant dry polymer electrolyte from Korean company LG Chem instead of a liquid or gel.

The LPI Hybrid came equipped with the 1.6-liter Gamma engine, a 15 kilowatts (20 hp) electric motor, and a continuously variable transmission (CVT).
The LPI Hybrid delivered 41.9 miles per US gallon (5.61 L/100 km; 50.3 mpg‑imp).
Compared to the conventional 1.6-liter model, and considering South Korean gasoline prices, the LPI Hybrid can travel 39 kilometres (24 mi) for the price of one liter of gasoline, while the conventional model would be able to travel only 15 kilometres (9.3 mi).
The engine emitted 99 g/km of CO
2, which allows the car to qualify as a Super Ultra Low Emission Vehicle (SULEV).
The LPI Hybrid produced 90 percent fewer emissions than an equivalent standard gasoline powered model, and LPG is a low carbon emitting hydrocarbon fuel that burns more cleanly than either gasoline or diesel, and also is free of the particulates associated with diesel.
The LPI Hybrid shares its powertrain with the Kia Forte LPI Hybrid.

The Elantra hybrid comes with an "Eco Guide" tree icon meant to coach the driver into developing more eco driving habits.
The CVT has an optional "E (Eco-Drive)" gear to maximize fuel efficiency.
The LPG Hybrid was dropped in Australia due to lack of demand, increase in emphasis on brand image and change in focus to cleaner diesel engines.
Hyundai presented the LPI Hybrid at the 2009 Seoul Motor Show, and sales began as the Avante "LPI Hybrid" in the South Korean market in July 2009. The LPI Hybrid (liquefied gasolineeum injected) is a mild hybrid and is the world's first hybrid electric vehicle to be powered by an internal combustion engine built to run on liquefied petroleum gas (LPG) as a fuel. Hyundai developed the technology and all key components in the LPI Hybrid, together with its local partners including the electric motor, battery and low DC/DC converter. The lithium-ion polymer batteries, which the LPI Hybrid was the first hybrid to adopt, differed from lithium-ion batteries, using a claimedly more stable and fire-resistant dry polymer electrolyte from Korean company LG Chem instead of a liquid or gel.
The LPI Hybrid came equipped with the 1.6-liter Gamma engine, a 15 kilowatts (20 hp) electric motor, and a continuously variable transmission (CVT). The LPI Hybrid delivered 41.9 miles per US gallon (5.61 L/100 km; 50.3 mpg‑imp). Compared to the conventional 1.6-liter model, and considering South Korean gasoline prices, the LPI Hybrid can travel 39 kilometres (24 mi) for the price of one liter of gasoline, while the conventional model would be able to travel only 15 kilometres (9.3 mi). The engine emitted 99 g/km of CO
2, which allows the car to qualify as a Super Ultra Low Emission Vehicle (SULEV). The LPI Hybrid produced 90 percent fewer emissions than an equivalent standard gasoline powered model, and LPG is a low carbon emitting hydrocarbon fuel that burns more cleanly than either gasoline or diesel, and also is free of the particulates associated with diesel. The LPI Hybrid shares its powertrain with the Kia Forte LPI Hybrid.
The Elantra hybrid comes with an "Eco Guide" tree icon meant to coach the driver into developing more eco driving habits. The CVT has an optional "E (Eco-Drive)" gear to maximize fuel efficiency. The LPG Hybrid was dropped in Australia due to lack of demand, increase in emphasis on brand image and change in focus to cleaner diesel engines.
Hyundai Elantra