The 2.2L engine of the LS, LT and LTZ models is rated at 148 horsepower (110 kW) at 5600 rpm* and 152 lb.-ft. of torque (260 Nm) at 4200 rpm.* Cobalt SS features a 2.4L engine rated at 173 horsepower (129 kW) at 6200 rpm* and 163 lb.-ft. of torque (221 Nm) at 4800 rpm.* The 2.0L SC engine of 2007 Cobalt SS Supercharged produces 205 horsepower (153 kW) and 5600 rpm and 200 lb.-ft. of torque (272 Nm) at 4400 rpm.

All 2007 Chevrolet Cobalt engines are from the technically sophisticated Ecotec family. Each has distinct performance and hardware differences, but all share a basic all-aluminum architecture and construction that includes:

- Dual overhead camshafts (DOHC) and four valves per cylinder
- Twin counter-rotating balance shafts
- Low-friction, roller-finger follower valvetrain with hydraulic lash adjusters
- Zero-maintenance chain camshaft drive
- Extremely compact dimensions and low mass
- Direct mounting of all accessories to the engine structure to eliminate common sources of noise, vibration and harshness
- Full circle transmission attachment is more rigid than most 4-cylinder powertrains for reduced noise and vibration
- GM Oil Life System for optimum oil change frequency
- No routine maintenance apart from oil/oil filter changes
- Catalyst located close to the exhaust manifold to speed catalyst "light-off" and reduce hydrocarbon emissions
- Innovative cast-in oil filter housing eliminates crawling under the car to perform oil changes. The design also eliminates throwaway oil-filter "cans" that retain used oil and typically end up in landfills

2007 Chevrolet Cobalt's standard transmission on LS, LT and SS is a Getrag F23 five-speed manual, known for smooth shifting. The F35 five-speed manual transmission in the SS Supercharged has a higher torque capacity than the manual transmission found in other Cobalt models. A short-throw shifter and 4.05:1 axle ratio complement the performance-oriented transmission and performance characteristics of the engine, giving the Cobalt SS Supercharged exhilarating acceleration.

Available on LS, LT and SS models and standard on LTZ is the Hydra-Matic 4T45 electronically controlled four-speed automatic transmission. Like the standard F23 manual transmission, the 4T45 is renowned for its smooth and durable operation. In 2007 Cobalt, this transmission uses full perimeter fastening directly to the engine block and oil pan to increase driveline stiffness, resulting in reduced noise and vibration. The 4T45 uses the new Dexron VI fluid and is "filled for life," meaning there is no scheduled maintenance required for the transmission under normal operating conditions.



Chevrolet Cobalt SS

Cobalt SS invokes Chevy's performance heritage, and is part of a larger family of Chevy SS models. Highlights of the SS coupe and sedan models include:

- 2.4L Ecotec VVT four-cylinder with 173 horsepower (129 kW) and 163 lb.-ft. of torque (221 Nm)*
- Standard five-speed manual transmission
- Available Hydra-Matic 4T45 four-speed electronically controlled automatic transmission
- Seventeen-inch alloy wheels and performance tires
- Performance-tuned suspension
- Standard four-wheel disc brakes with four-channel ABS system
- SS-specific front and rear fascias, rocker moldings (similar to SS Supercharged)
- SS exterior badging
- SS-specific interior appointments, including instrument panel appearance and trim

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