The Aerio's 2.3-liter engine has 155 horsepower and earns an EPA fuel economy rating of 25 city/31 highway. The engine makes decent low-end power and is surprisingly smooth at highway...
... speeds. The automatic does not detract much from performance, and does a good job of selecting a proper gear and not "hunting" with throttle changes.
The five-speed manual feels equally at home in the Aerio, although you may find the shift throws to be a bit long. The Aerio's suspension gives a comfortable ride on par with this class, and interior sound levels remain fairly low.