|The 2014 Chevrolet Impala is now incorporated with the Ecotec 2.5-liter powerplant for a more precise engine note. The latest 4-cylinder engine with advanced valvetrain technology also plays a major in the car’s fuel efficiency ratings.|
Aside from the newer 2.5l Ecotec engine, the Impala line-up already offers two other powertrain choices: the Ecotec 2.4l with eAssist and the powerful 3.6l V6. In the United States, GM predicts a better demand for the 2.5l Ecotec Chevrolet Impala. While, more than two thirds of Chevrolet cars sold in the first quarter of this year are the four-cylinder engine options.
The 2.5 Ecotec 4-cylinder engine provides better fuel efficiency, thanks to the Intake Valve Lift Control technology. In older engines, valves operate strictly based on mechanical camshaft rotation, opening and closing the same way all the time. Chevy’s new system allows the valves to open and close by varied amounts and at different times depending on power demand to provide greater fuel efficiency or power.
When the technology operates in low-lift mode, the engine pumps only the air it needs to meet the driver’s demand. The system switches to high-lift mode at higher engine speeds or under heavy loads, providing the full output capability of the engine.
Chevrolet Impala’s 2.5L engine produces up to 196 hp and 252 Nm of torque. The engine’s Variable Valve Lift with a new rocker arm allows quicker switches between low and high lift intake cam profiles. The mechanism is actuated by an oil control valve through a dual-feed stationary hydraulic lash adjuster. It is the first of its kind for low friction roller-type finger-follower valvetrains in gasoline engines. The engine’s computer continuously selects the optimal lift profile based on conditions such as engine speed and load. Thanks to this technology, the Chevrolet Impala is now able to achieve an estimated fuel economy of 11.2l per 100km (21 mpg) in the city and 7.59l/100km (31 mpg) on the highway.
Engine noise has been reduced by as much as 40 percent from the existing Chevrolet Impalas, accredited to the sound absorbing cover that’s integrated to the intake manifold, quieter drive chains. and the technical department’s push to achieve radiated noises into a higher frequency range; well above 2,000 hertz. The 2014 Chevrolet Impala with 2.5l Ecotec is said to reach the most intense engine sound at higher ranges, which is most preferred by Impala buyers. Additionally, Impala’s passengers get a quieter driving experience due in part to active noise cancelling technology and a more refined sound as the engine revs to its 7,000-rpm peak.
The 2014 Chevrolet Impala Ecotec 2.5l four-cylinder engine with new advanced valvetrain technology retails from $27,535 at Chevy dealerships.