2010 Subaru Impreza WRX STI A-Line

Based on the Impreza WRX STI, the WRX STI A-Line model was developed to offer its distinctive driving performance to a wider range of customers by integrating 2.5-litre turbocharged Boxer engine and 5 Speed Automatic Transmission with SPORTSHIFT.

The unique 2.5-litre BOXER engine comes with a single scroll turbocharger and produces a flat torque from the low and mid-rev range to high-rev range. Dual Active Valve Control System (AVCS) was adopted to control continuously valve timing on both intake and exhaust valves, which improves low and mid-range range torque, high-rev range output and environmental friendliness. Tumble Generation Valve (TGV) controls the intake air stream to generate high combustion efficiency.

Source: Subaru Press Release