Fiat Automóveis was the first car manufacturer in the world to launch a production model that can run with four different kinds of fuel, and that car is on show to visitors at the 25th Salão Internacional do Automovel in São Paulo this week.

Since its arrival in Brazil, Fiat’s trajectory has been marked by pioneering models, concepts and technology, always respecting the environment. Fiat Automóveis was the first car manufacturer in the world to launch a production model that can run with four different kinds of fuel, and that car, the Fiat Siena Tetrafuel, is on display to visitors in the halls of the 25th Salão Internacional do Automovel in São Paulo this week.

The Fiat Siena 1.4 Tetrafuel is able to operate efficiently when using ethanol; Brazilian market specification petrol (featuring around 25% of ethanol mix); pure petrol, and finally on Compressed Natural Gas (CNG).

The use of this wide spectrum of fuels is managed by only one ECU. They are alternated according to the necessity of the moment, and the driver does not interfere in the process. Decide which fuel is more suitable at each moment is carried out automatically by the ECU.

The system, which has been developed jointly with Magneti Marelli, selects the best fuel for each condition, always giving special attention to economy. The first option is the CNG. If system detects a necessity to use another fuel – for example, during moments of strong accelerations – the system automatically transfers for another fuel option in a smooth and automatic way. However, whatever the alternative that is used the car keeps its performance uniform and convincing.