The short answer
Based on available data, the Ford Mustang comes out ahead of the Ford Cougar on 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 highly fragmented and generation-dependent. For classic models (1967-1973), sentiment is overwhelmingly positive, with owners describing them as "sweet," "cool," and "completely reliable" vehicles with desirable V8 engines and strong collector appeal, particularly for special editions like the 1968 GT-E 427 and 1970 Eliminator. For the final "New Edge" generation (1999-2002), sentiment is sharply negative to dismissive.
Best version to buy
For classic models, the 1968 Mercury Cougar GT-E 427 and the 1970 Mercury Cougar Eliminator are highlighted as the most desirable, high-performance versions. For the final generation, no specific trim or version is recommended as "best." The V6 manual transmission is specifically criticized, with period reviews cited as recommending the automatic instead.
Known issues
Overall
Sentiment is highly fragmented and generation-dependent. Long-term owner reports for older generations (e.g., SN95/New Edge, S197) often express strong satisfaction with reliability, simplicity, and the ownership experience, with some owners reporting trouble-free operation well past 100,000 miles. For the S550 generation (2015-2023), feedback is mixed.
Best version to buy
Insufficient owner data available to declare a consensus "best" version. Isolated positive remarks exist for the S550 Mach 1 for its balance of performance and reliability compared to the GT350, and for the 2013+ S197 GT500 for its historical impact.
Known issues
The verdict
The Ford Mustang is the better choice for most buyers.
It has more power on its best-equipped version than the Ford Cougar, based on the data above. If efficiency matters more to you than outright power, the Ford Cougar is worth a closer look instead.
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Which is more reliable, the Ford Cougar or the Ford Mustang?
Owner reports show similar reliability sentiment for the Ford Cougar and the Ford Mustang. Check the known issues listed above for specific differences between the two.
Which is better for families, the Ford Cougar or the Ford Mustang?
The Ford Cougar seats more passengers than the Ford Mustang on its catalogued best-equipped version. Body type also differs: the Ford Cougar is classed as a Coupe, the Ford Mustang as a Fastback.
Which has better fuel economy, the Ford Cougar or the Ford Mustang?
Fuel consumption data is limited for one or both models. Check the specs table above for the figures available on each catalogued version.
Which is cheaper to maintain, the Ford Cougar or the Ford Mustang?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Ford Mustang than the Ford Cougar. See the known issues comparison above.