GM hasn't "formally" announced what the next gen Aveo/Sonic fuel consumption numbers will be.
But in a YouTube presentation of the Sonic 1.4 turbo hatchback, Margaret Brooks, GM Small Car Marketing Director, says it'll be good for 40 mpg (US).
We'll presume that's the highway rating, though she doesn't say so.In terms of fuel economy, we've said that our 1.4 liter turbo is going to get 40 MPG. That is clearly our most fun to drive powertrain with 40 MPG, I don't think there's anything on the planet where you can have more fun getting 40 MPG than the Sonic.
FYI, 40 MPG (US) = 48 MPG (Imperial) = 5.9 L / 100 km
- Ford Fiesta is the current subcompact fuel economy leader (non-hybrid) in the U.S., rated at 40 MPG highway for the SFE model. That's with a 120 hp 1.6 L engine.
- Note that the Chevrolet Cruze, with the same 1.4t engine, and ~500 lbs more weight than the Sonic is rated for 42 MPG highway. (Though that's the ECO model, which has a few extra efficiency mods that the regular Cruze - and likely the Sonic - won't have.)
- 2012 Hyundai Accent - Hyundai is also competing for the MPG crown with its next gen subcompact hatch and sedan. That car, unveiled at the Montreal Auto Show last week will have a 138 hp (same as the Cruze/Sonic) 1.6L direct injection gasoline engine, and it'll probably squeeze out low 40's on the highway. In Montreal, the company is saying the Accent will be good for 4.7 L/100 km on the highway (source), which actually translates to 50 MPG (US). But that figure may represent the Canadian fuel economy test figure, which is more optimistic than the EPA's numbers.
So it looks like the Sonic will at least tie for best highway MPG in the subcompact segment... for a while.
YouTube video with Margaret Brooks' comments about the Sonic MPG:
YouTube - 2012 Chevrolet Sonic - 2011 Detroit Auto