The TwinAir-powered Fiat 500, with its 0.9-liter engine, is claimed to be the most fuel-efficient gasser in the Cinquecento's lineup. With a healthy 84 horsepower and 107 pound-feet of torque at a low 1,900 rpm, this pint-sized Fiat is a capable performer, though far from quick. However, stoplight-to-stoplight performance is not the TwinAir's forte. The two-cylinder mill is designed to operate smoothly, provide sufficient thrust for moving around city streets and propel the 500 to a highway-capable 85 miles per hour when needed.
Fifth Gear recently took Fiat's TwinAir-powered 500 for a spin on UK roads and noted that the 0.9-liter mill is effectively, well, half an engine. Through a mixed terrain driving route, Fifth Gear discovered that the TwinAir is rather fuel-efficient, though not quite the gas sipper that Fiat claims. However, the tester pointed out that the TwinAir mill performs admirably, emits just 95 grams per kilometer of CO2 and is well-rounded. Hop the jump to watch Fifth Gear put the Fiat 500 TwinAir to the test.