Fiat has given its smallest car, the 500, an even smaller engine with the launch of a two-cylinder version that will develop as little as 84bhp.

The little petrol engine will aim to be one of the cleanest of its kind, with emissions as low as 92g/km for the automatic version and 95g/km for the manual for both the hatchback and convertible versions.

Most cars that boast emissions levels this low currently come with a diesel engine or a hybrid motor to take some of the strain, but Fiat has simply applied its MultiAir technology and reduced the amount of cylinders on offer.

Despite the diminutive dimensions, the 500 is said to have the same power and performance as a 1.4-litre 16v engine, but with emissions that are 30 percent lower. It should be able to offer a 0-62mph time around 11 seconds and fuel economy of around 70.6mpg.

As well as using technology like start stop and a gear shift indicator to maximise efficiency, the new engine is 10 percent lighter than the equivalently performing four-cylinder model.

There is no firm date on when the engines will be available to customers, but we should be able to tell you more when we get behind the wheel of the new pint-sized engine in the autumn.