The 2007 Subaru Impreza represents a significant moment in the brand’s history, marking the peak of the second-generation design before the shift to the more angular third generation. Under the hood, this model year offered a compelling blend of reliability, efficiency, and engaging performance that solidified its reputation among enthusiasts. This focus on the powertrain details provides a clear picture of what makes the 2007 model year a specific and desirable segment within the Impreza lineage.
The Heart of the 2007 Impreza: Engine Options and Specifications
Powering the 2007 Subaru Impreza was a choice between two distinct engine configurations, each catering to different driver priorities. The standard offering was the EJ254, a 2.5-liter horizontally-opposed (boxer) four-cylinder engine. For those seeking more performance, the turbocharged EJ257 engine was available, primarily in the WRX and WRX STI trims. Understanding the specific output figures and technological differences between these units is crucial for evaluating the model year’s capabilities.
Standard Power: The EJ254 Engine
The naturally aspirated EJ254 engine delivered a balanced mix of everyday usability and spirited performance. Producing 166 horsepower and 166 lb-ft of torque, it provided adequate power for highway merging and confident city driving. The boxer design’s low center of gravity contributed to the vehicle’s handling precision, a core Subaru characteristic that remained evident regardless of the engine choice. This configuration was the workhorse of the lineup, offering impressive reliability for daily use.
Performance Power: The Turbocharged EJ257
For the performance-oriented buyer, the turbocharged EJ257 engine was the definitive choice. Found in the WRX and the high-performance WRX STI, this engine generated 227 horsepower and 235 lb-ft of torque in the standard WRX configuration. The WRX STI pushed these numbers even further, leveraging its intercooled design to produce robust power figures that made it a serious competitor in the compact performance segment. The inclusion of Subaru’s Symmetrical All-Wheel Drive system ensured that this power was transmitted effectively to the road in all conditions.
Engineering and Drivetrain Integration
The true genius of the 2007 Impreza’s powertrain lies not just in the engines themselves, but in their seamless integration with the drivetrain. Subaru’s Symmetrical All-Wheel Drive system is a cornerstone of the brand’s identity, and it was perfectly matched to the boxer engines. This combination provided exceptional traction, particularly in wet or snowy climates, which was a key selling point. The manual transmission remained a popular option for driving enthusiasts, offering direct control over the power delivery that the turbocharged engines excelled at providing.
Reliability, Maintenance, and Ownership Experience
Owning a 2007 Impreza means inheriting a machine built for durability, but like any vehicle, it requires proper attention. The EJ series engines are generally robust, though owners should be mindful of timing belt replacement intervals, a critical maintenance item for these models. Regular oil changes and adherence to the factory service schedule are paramount to ensuring the longevity of the horizontally-opposed engine. The cooling system also warrants attention, as the layout can make certain components more susceptible to overheating if not maintained correctly.
