2007 Fiat Siena Tetrafuel

POWER PLANT

1.4-L 4-cylinder

59 kW (gasoline, ethanol)

50 kW (natural gas)

TRANSMISSION

5-speed manual

CLAIMED FUEL EFFICIENCY

5.6 to 7.7 L/100 km (gasoline)

8.3 to 11.5 L/100 km (ethanol)

15 to 20 km/m3 (natural gas)

MORE

At 6270 liters per hectare (670 gallons per acre), Brazil’s production of ethanol from sugarcane is nearly twice as efficient as U.S. production from corn, according to the Earth Policy Institute.

Research and translation for this segment was provided by Erico Guizzo.