The 2018 Subaru Impreza represents a significant moment in the model's evolution, combining refined daily driving dynamics with the brand's signature symmetrical all-wheel drive. This generation moved away from the sharper handling of the original design toward a more comfortable and technologically advanced experience. Under the hood, the engine options were tuned to deliver a balance of efficiency and responsiveness suited for both city commutes and weekend adventures. Understanding the mechanics and purpose of the 2018 Impreza's powertrain is key to appreciating its role in the compact sedan and hatchback market.
The Heart of the 2018 Impreza: Engine Specifications
Powering the majority of the 2018 lineup is the FB20 boxer engine, a 2.0-liter naturally aspirated unit that replaced the older EJ series. This change was not merely cosmetic; the FB20 was designed with modern fuel efficiency and lower emissions in mind without sacrificing the low-end torque characteristic of Subaru's design philosophy. For performance-oriented buyers, the WRX variant stepped things up with a turbocharged version of this platform, the FA20F, which added a boost of horsepower while maintaining the core layout that enthusiasts trust.
FB20 Engine Details
Displacement: 1,995 cc
Configuration: Horizontally-Opposed (Boxer)
Fuel Delivery: Direct Injection
Horsepower: 152 hp
Torque: 144 lb-ft
WRX FA20F Turbo Specifications
Displacement: 1,995 cc
Configuration: Horizontally-Opposed (Boxer)
Forced Induction: Turbocharged
Horsepower: 268 hp
Torque: 258 lb-ft
Engineering the Power: Symmetrical All-Wheel Drive
What truly sets the 2018 Impreza apart is how that engine's power is delivered to the road. Subaru's Symmetrical All-Wheel Drive system is standard on every trim, ensuring maximum traction in various weather conditions. The layout positions the engine longitudinally with a balanced weight distribution, contributing to the vehicle's stability and cornering precision. This system is not an afterthought; it is integrated into the chassis design to work harmoniously with the FB20 or FA20F engines, providing confidence-inspiring control whether the roads are dry or slick.
Performance and Efficiency Balance
One of the primary concerns regarding a boxer engine is often fuel economy, but the 2018 Impreza defies expectations. The FB20 unit features direct injection and variable valve timing, which optimize the air-fuel mixture for better combustion. Consequently, drivers can expect respectable highway figures that allow for worry-free longer trips. The WRX, while thirstier due to its turbo nature, manages to remain practical, offering a thrilling yet usable driving experience that doesn't punish the driver at the pump too severely.
Reliability and Maintenance Considerations
When evaluating the 2018 model year, reliability is a significant factor for buyers. The FB20 engine has proven to be a robust and reliable powerplant, benefiting from Subaru's extensive boxer engine heritage. However, potential owners should be aware of the timing belt setup; the boxer configuration requires a specific maintenance schedule to ensure the valvetrain operates correctly. Staying on top of the recommended service intervals is crucial for maintaining the longevity of the engine and preserving the vehicle's value over time.
