1st impressions- 2012 1LT Turbo HB (long)
Manufacture date Oct 2011
Engine: 1.4 turbo- US
Trans: 6 Speed Manual- AU
I took delivery of the car 10 days ago, and have put about 100 miles on it:
Ave. MPG: 25.5 during a moderately aggressive break-in process. while I do not yet have much data for economy style driving, I fully expect this car to exceed the stated mpg averages in normal driving conditions.
Clutch: My vehicle's clutch engages consistently at approx. 1" from the floor.
I did not take note of the disengage point; my foot tells me i am dealing with less then 1/4" of "slip" range before the clutch is fully engaged or disengaged. I have not experienced any grabbing, uncontrolled slipping or chattering.
There is about 3/4" of free-play at the beginning of the peddle travel, before the throwout bearing touches the leaf springs on the clutch.
I have not measured the distance of full peddle travel.
Trans: Shifting seems smooth, the syncros solid. I have not been able to pop it out of any gear throughout the useable power band during hard acceleration or deceleration. The gearing seems intuitive for me. It feels like a 4 speed with 2 overdrives. My car does about 90mph at 6000rpm in 3rd (cant say exactly, I was watching for speed traps and monitoring the tach), and i didn't take it over 90mph, because i don't know the speed range of the factory Hankook tires
Engine: The 1.4L turbo/6 speed trans combo seems to be a great match for the Sonic's GVW of ~3500lbs.
The low end of the power band is about 2000rpm. From 2-6krpm, acceleration is smooth, positive, and very responsive. Deceleration is dampened (naturally or intentionally) so the car is not jerky during transition from accel to decel or during engine breaking.
The turbo appears to have 2 modes of operation, demand-driven and load-driven. I have not researched the Ecotec series specs or implementation yet, so I am simply reporting my experience and suspicions.
In the 2-6k rpm range it feels demand-driven. The response to accelerator pedal input is immediate and satisfying (applying 3/4 to full throttle at 3-5k rpm is impressive).
In the economy range (idle to 2k rpm) it feels load-driven, response to accelerator pedal input is dampened. The engine will ramp up to the low end of the power band, where there is a slight but noticeable step up to the demand-driven mode. It does not feel like its lugging, as a normally aspirated 1.4L hauling 3500lbs around would, so I think the turbo kicks in and out in this rpm range to achieve fuel economy while still supplying sufficient power.
I got into a couple of situations where i needed to jack rabbit in traffic while in this rpm range. Downshifting and punching it worked every time.
Suspension, Steering and Brakes: I feel very much in control while driving this car. It is responsive, stable, and handles like a sports car. The ride is reasonably comfortable, yet stiff enough to provide good road feedback. I expected the turning radius to be a bit tighter, but it is sufficient to negotiate most parking situations. Braking is smooth and positive. Its been raining for 7 of the 10 days that I have had the car and it handles well in both wet and dry conditions. We have not had snow yet. I do not have access to a track so I have not yet invoked the anti-lock braking or Stabilitrac systems.
Exterior: I have not found any problems with the fit and finish. As with all Hatchbacks, the aerodynamics of the car are not ideal. Additionally, I can hear some wind turbulence in the front wheel wells starting at about 50mph. The car does not buffet at high speeds on an open road. I have not tried it in the wake of semi at highway speeds, but it seemed to handle a variable 20mph crosswind well.
Interior: Fit and finish seem fine so far. The 1LT package is pretty nice, and the car doesn't look or feel cheap. There is an unbelievable amount of head and leg room for a compact model. The storage space in the HB is great (30+ cu ft). I'm still getting used to the blind spots, but the external mirrors are surprisingly effective. The head rests on the rear seats block about 30% of the view in the rear view mirror, I wish they were removable. I don't normally have more than 1 passenger, so i keep them folded down anyway.
Overall: I expected the learning curve that comes with jumping from a 1964 Chevy Van to 2012 Chevy Sonic to be pretty steep. I am pleasantly surprised to find how easy this car is to transition to. It is practical, economic, cheap to operate and insure, affordable, and fun.
GM did an outstanding job of bundling performance and economy with the 1.4L turbo, its worth every penny of the additional $700. If you follow the shift indicator, you will find yourself cruising along at about 1200rpm. Need power? Its a simple downshift away. I'm somewhat surprised GM released the Sonic at a price point so close to the Cruze. For under $20k this car is a gem.
Sorry about the length of this post, but i wanted to report on some of the issues other posters had brought up. Hope u find this helpful.