I drove the 3 engines in the Edge.
1-The 2.0T is absolutely sluggish in my opinion, the torque delivery isn't linear so it feels slow in various power bands - when you are boosting, it's strong though. So boosting I was all the time.
2-The V6 has a linear power band and torque delivery, the engine note is quite good as well...this was the most efficient of the Edges I drove!
3-BUT the engine to get in the Edge is the 2.7T, I had a blast on it! and surprisingly enough the displayed fuel economy was very close to the 2.0T.
In my opinion, Ford needs to revisit the 2.0T, or just scrap it in favor of the 2.3T! The 2.0T can't handle anything heavier than a Ford Escape.
Turbochargers like high octane fuel. Do you have 92 octane in your area?
Not sure if Ford cars come from the factory with higher octane or not. Higher ambient temperatures play a big roll in forced induction too.
It depends how they are tuned. Theoretically, you could tune a turbo car for 87. More than likely, it's tuned on 91 octane. I can't see a manufacturer like Ford tuning a popular vehicle for fuel that you cannot get at the pump in California (pump 91 is the highest gasoline and then after that you go E85).
Yes, temps do play a part in operation. Cooler air is denser and also cooler ambient temps help intercoolers work well. However, if the cooling system is designed right, heat soak isn't an issue.
