The short answer
Based on available data, the Ford Focus comes out ahead of the Chevrolet Cobalt on fuel economy and power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Overall
Sentiment is mixed to negative, heavily dependent on the vehicle's age, maintenance history, and specific model year. The Cobalt is widely regarded as a basic, affordable transportation appliance, with some owners reporting high mileage (over 250,000 miles/400,000 km) with diligent, often self-performed, maintenance. However, the community feedback is dominated by recurrent and very frequent reports of electrical system failures, transmission problems (particularly in automatics), and premature rust/corrosion.
Best version to buy
Insufficient owner data available to declare a definitive "best" version. The manual transmission models are implied to be preferable due to fewer reported issues compared to the problematic automatic transmissions.
Known issues
Overall
Sentiment is sharply divided by transmission type and generation. For models equipped with the manual transmission, owner feedback is overwhelmingly positive, describing them as reliable, fun to drive, economical, and a great value. This is particularly true for the final generation (2012-2018) with a manual gearbox.
Best version to buy
Manual Transmission Models (any trim, 2012-2018 generation): There is a very strong, repeated consensus that the manual transmission is the defining factor for a good ownership experience. The manual is described as "rock solid," "easy to drive," and the solution to avoiding the pervasive automatic transmission problems.
Known issues
The verdict
The Ford Focus is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Chevrolet Cobalt, based on the data above. If power matters more to you than running costs, the Chevrolet Cobalt is worth a closer look instead.
Common problems by model year
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Owner reports show similar reliability sentiment for the Chevrolet Cobalt and the Ford Focus. Check the known issues listed above for specific differences between the two.
Both seat a similar number of passengers based on our data. The Chevrolet Cobalt is classed as a Coupe, the Ford Focus as a Hatchback, which affects cargo space and ride height for family use.
The EPA rates the 2010 Chevrolet Cobalt at 25–30 mpg combined and the 2018 Ford Focus at 22–34 mpg, depending on the version.
Exact maintenance costs aren't in our data, but reliability signals above are the closest proxy: fewer reported issues generally means lower repair costs over time.