What Should You Consider Before Buying a 427R Roush Mustang?


Quick Answer

The Roush 427R was a modification of the Ford Mustang that has been equalled or surpassed in raw engine performance by many newer production Mustang models as of 2015. It is likely that a used Roush 427R is more expensive and less reliable than these newer models.

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Full Answer

Produced from 2006 to 2010, the Roush 427R was so named as the modifications to the base Mustang engine boosted its output to 427 horsepower. These included a Roush supercharger and ECM calibration. As these are aftermarket modifications, there is a higher chance of mechanical issues with a Roush 427R as compared to a factory Mustang. In addition, prices for the Roush 427R have remained relatively high due to the rarity of the vehicle, with prices in the mid-$30,000 range common as of March 2015.

In comparison, a new 2015 Ford Mustang GT has a base MSRP of $32,300 and produces 435 peak horsepower from a naturally-aspirated engine. It is less expensive and more likely to be reliable than a used Roush 427R while producing slightly more power. In addition, a new Mustang is covered by a factory warranty from Ford, while a used Roush 427R is unlikely to be covered by a warranty.

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