Quote:
Originally Posted by niky
Oops. Yeah. Of course, running at 16:1 or more at low rpm, my car is far from stock... 
Ford's pitch for the Ecoboost 2.0 shows a wider range of rpms and loads where the BSFC is optimum versus a naturally aspirated motor.
Of course, that's all theoretical. What happens on the road, with varying gasoline quality, high temperatures and whatnot... might be different. |
My parents have a 2.0 Ecoboost escape. It's geared pretty tall ("rear end" ratio of 3.07:1). It has torque everywhere.
With it's wide torqueband, it's able to cruise down the highway at 1500RPM comfortably.
If the 2.0 in my Focus were to cruise down the highway at 1500RPM, I would get HORRIBLE mileage.
My father got 32MPG on a trip out of their 2.0 Ecoboost Escape AWD!
That's the advantage of these small turob gas engine. They are fun, too ... which ends up leading people to get worse mileage with them.
But it's a small engine that, when driven lightly, can get excellent mileage. Driving it lightly with low boost, it makes good enough torque to keep the vehicle moving without playing "catch up" and by virtue of being a small engine at low speed gets better mileage.