The Civic is using a carry over 1.8L that is efficient, but somewhat noncompetitive to it's competition in terms of power. When the previous generation Civic debuted back in 2007, having 140 horsepower and 5 forward gears was actually pretty good. Fast forward to today and now most cars have more than 140 horsepower, and 6 gears or a CVT.
To get better fuel economy, Honda has a vtec system that has two modes. A regular "power mode" that is for every day driving and actually doesn't have that much power, and a special fuel economy mode that mimics the traits of an Atkinson cycle engine for better fuel economy. However, this mode is only triggered in light cruising. Previous vtec implementations had two profiles for low and high RPM operations and were more performance oriented. Now you have a fixed SINGLE cam (intake and exhaust timing are fixed in relation to each other) and a fuel efficiency mode. This means you have neither high or low end power, but a fixed profile like an old school car.
Kia has elected to use direct injection on it's proven "Nu" 2.0L inline 4 to achieve excellent fuel economy and power at the same time. Unlike many GDI engines out there, this engine lacks EGR, which is one of the largest contributing factors to gummed up intake valves on GDI equipped vehicles. Hyundai/Kia has simply adjusted the variable valve timing to mitigate the need for this technology. You also have TWIN cams that allow independent control of the intake and exhaust valves in relation to each other. That allows for great low and high end power because of more adjustability. Also, the use of an automatic with 6 gears versus five helps out.
The Kia almost feels like a small V6 or large 4 cylinder when driven. Both engines have a 81 mm bore, but the Kia has a much larger stroke that contributes to more low end torque. The means not having to rev the crud out of an engine to get the needed passing power.
Honda and Toyota have been riding on their name for some time. Toyota releases a new for 2014 Rav-4 only to fail the most recent crash test. Honda releases the new 2012 Civic only to change it for 2013 because all the non-blind objective reviewers heavily panned it. Honda still sold 250,000+ of them. This tells me that you have a large group of people buying a name instead of shopping for the best car possible. They never looked at anything else because they wanted a Honda. Past performance is never a guarantee for future returns.
So you have two brands. One brand that is quote on quote proven and has a nice car but sells them regardless or whether the car is nice or not because of blind public perception. On the other side, you have a brand clawing for approval that is doing everything they can to impress and keep any buyer that comes along because they are a newer entity. Do you want the guy siting on his butt, or the guy working super hard to make a name?
Lastly, the Forte is listed on Ward's top 10 interiors. Motor Trend did a test on the Forte versus Mazda, Honda, Dodge, and Nissan. The Forte was the UNANIMOUS winner. Fastest acceleration, shortest stopping distance, and second best observed fuel economy AHEAD OF THE CIVIC.
I would abstain from that comments of the uninformed lemmings in the previous posts. I am an automotive journalist, and Honda and Toyota are on my s@$% list right now for passing inferior products on the American public by using their name instead of making the best product possible.
-Snake