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Parkers overall rating: 4 out of 5 4.0

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 5.7 - 7.4 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 33.2 - 42.8 mpg

Most economical engine choice from launch is the 2.0-litre TDI diesel with average fuel consumption of 67.3mpg.

It’s joined by a 1.6-litre TDI in February 2014, with average fuel consumption forecast to potentially approach the 70mpg mark.

The 138bhp 1.4-litre TFSI petrol can average up to 56.5mpg according to Audi, partly thanks to its clever Cylinder-on-Demand technology explained in the Performance section.

Even for the top 178bhp 1.8-litre TFSI version, Audi A3 Cabriolet running costs in terms of fuel consumption are not bad at all at a claimed 48.7mpg average.

Lower weight and more efficient engines have helped make Audi A3 Cabriolet emissions far lower than the previous-generation model.

From launch, the 2.0-litre TDI diesel offers the lowest CO2 emissions of the range at 110g/km.

We can expect that to be beaten by the 1.6-litre TDI available from February 2014. Figures are yet to be released for that variant but in other versions of the A3 it emits less than 100g/km.

The top 1.8-litre TFSI petrol chucks out 133g/km of CO2, which is still a relatively low figure given its performance.

Since this the fourth model variant to join the main A3 line-up, there should be little to worry you about Audi A3 Cabriolet reliability. All the major mechanical parts are well proven and the roof mechanism appears durable.

Ongoing running costs

Road tax (12 months) £20 - £465
See tax rates for all versions
Insurance group 18 - 46
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