gas cylinder in the trunk, the CNG injection system, and electronics. As of 2009 Argentina had 1,807,186 NGV's with 1,851 refueling stations across the nation, or 15% of all vehicles; and Brazil had 1,632,101 vehicles and 1,704 refueling stations, with a higher concentration in the cities of Rio de Janeiro and São Paulo. Colombia had an NGV fleet of 300,000 vehicles, and 460 refueling stations as of 2009. Bolivia has increased its fleet from 10,000 in 2003 to 121,908 units in 2009, with 128 refueling stations. Peru had 81,024 NGVs and 94 fueling stations as 2009,. In Peru, several factory-built CNVs have tanks installed under the vehicle's body, leaving the trunk free. Among the models built with this feature are the Fiat Multipla, the new Fiat Panda, the Volkswagen Touran Ecofuel, the Volkswagen Caddy Ecofuel, and the Chevy Taxi. Right now, Peru has 224,035 NGVs. Other countries with significant NGV fleets are Venezuela (226,100) as of 2017 and Chile (15,000) as of 2017. Latest developments GM do Brasil introduced the MultiPower engine in August 2004 which was capable of using CNG, alcohol and gasoline as fuel. The GM engine has electronic fuel injection that automatically adjusts to any acceptable fuel configuration. This motor was used in the Chevrolet Astra and was aimed at the taxi market. In 2006 the Brazilian subsidiary of Fiat introduced the Fiat Siena Tetra fuel, a four-fuel car developed under Magneti Marelli of Fiat Brazil. This automobile can run on 100% ethanol (E100), E20 to E25 blend (Brazil's normal ethanol gasoline blend), pure gasoline (not available in Brazil), and natural gas, and switches from the gasoline-ethanol blend to CNG automatically, depending on the power required by road conditions. Since 2003 and with the commercial success of flex cars in Brazil, another existing option is to retrofit an ethanol flexible-fuel vehicle to add a natural gas tank and the corresponding injection system. Some taxicabs in São Paulo and Rio de Janeiro, Brazil, run on this option, allowing the user to choose among three fuels (E25, E100 and CNG) according to the current market prices at the pump. Vehicles with this adaptation are known in Brazil as tri-fuel cars. South Asia India In 1993, CNG had become available in Delhi, India's capital, though LPG is what really took off due to its inherently far lower capital costs. Compressed Natural Gas is a domestic energy produced in Western parts