The 2008 Subaru Impreza represents a pivotal moment in the model's evolution, blending proven engineering with a more refined driving experience. This specific year marked the transition to the second generation of the Impreza, benefiting from lessons learned during the first decade of the 21st century. Under the hood, buyers could choose between two distinct powertrains designed for different priorities, yet united by Subaru's signature symmetrical all-wheel drive. Understanding the nuances of the 2008 powertrain options is essential for anyone considering this model year, whether for daily driving or a focused weekend project.
The Heart of the 2008 Impreza: Engine Options
When you pop the hood of a 2008 Subaru Impreza, you are greeted by two primary engine choices, each delivering the performance and efficiency Subaru is known for. The standard offering is the 2.5-liter horizontally-opposed "Boxer" engine, a design that lowers the center of gravity for superior handling. For drivers seeking more spirited performance, the turbocharged 2.5-liter "Boxer Turbo" was available, transforming the car into a far more dynamic machine. Both engines were mated exclusively to Subaru's symmetrical all-wheel-drive system, providing confident traction in various driving conditions.
The Base 2.5L Boxer Engine
The naturally aspirated 2.5-liter engine found in the base models produces 173 horsepower and 174 lb-ft of torque, figures that prioritize efficiency and reliability over raw speed. This "EJ253" variant was tuned for smooth daily operation, making it an excellent choice for commuters and families. The power delivery is linear and predictable, contributing to a composed and stress-free driving experience. Fuel economy benefits from this setup, with the base engine typically achieving better MPG figures compared to its turbocharged sibling, especially during highway cruising.
The Performance-Oriented 2.5L Turbo Engine
For the driver who craves engagement, the 2008 Impreza WRX and WRX STI models feature the turbocharged 2.5-liter engine. This "EJ257" variant generates 227 horsepower and 235 lb-ft of torque, providing a significant boost over the base model. The turbocharger spools up efficiently, delivering a strong push in the mid-range that makes passing and merging effortless. The turbocharged Impreza retains the sharp handling of the base car but adds a new level of excitement, transforming it into a true driver's car that still remains practical for real-world use.
Drivetrain and Engineering Details
Subaru's symmetrical all-wheel drive is the cornerstone of the Impreza's capability, and the 2008 models utilize an advanced version of this system. The power is distributed front-to-rear and side-to-side, maximizing grip and stability on wet roads, gravel, or light snow. This setup is managed by a standard automatic transmission for most configurations, while performance trimes often featured a manual gearbox that was highly regarded for its precision and engagement. The chassis was also refined in 2008, resulting in a smoother ride and better handling balance compared to earlier years.
Reliability and Maintenance Considerations
Owning a 2008 Subaru Impreza means inheriting a vehicle built to last, provided regular maintenance has been observed. The Boxer engines are generally robust, but they do require specific attention regarding oil changes and cooling system checks. Using the correct weight of synthetic oil is crucial for the longevity of the horizontally-opposed engines. Owners should also be mindful of the timing belt, which is an interference design; failure can lead to severe engine damage, making adherence to the manufacturer's service schedule non-negotiable.
