The most efficient Crosstrek ever? Subaru’s hybrid gets a bit rugged.

At first glance, the Subaru Crosstrek stands out with its rugged design, showcasing a personality that prioritizes adventure over aerodynamic finesse. This popular model is exclusively available with all-wheel drive, reflecting Subaru's commitment to delivering all-weather reliability and catering to an adventurous lifestyle. The latest iteration introduces a hybrid variant that not only enhances power and torque but also marks a significant milestone as the most efficient Crosstrek ever produced. While aerodynamic refinements are minimal, features like wheel well vents help mitigate turbulence and optimize airflow along the vehicle's sides. Subtle design changes, such as the streamlined edges of the roof rail mounts, contribute to a more aerodynamic profile. Interestingly, the reduced use of plastic cladding in the hybrid model results from production decisions in Japan, rather than a design choice aimed at improving aerodynamics, as American consumers often favor more substantial trim. The real game-changer lies in the Crosstrek's hybrid powertrain, now shared with the Forester SUV. This system incorporates a naturally aspirated 2.5-liter horizontally opposed Boxer four-cylinder engine, familiar to Subaru enthusiasts, but it has undergone extensive mechanical enhancements. Significant modifications to the engine's cylinder head, block, camshaft, fuel system, and other components have transformed its efficiency. Notably, the engine now operates on an Atkinson cycle, which optimizes fuel efficiency by holding intake valves open longer, reducing piston resistance during the expansion stroke. This adjustment may lead to a decrease in power output, but it is effectively compensated by a pair of motor-generators. Unlike many hybrid crossovers that utilize a single electric motor at the rear, Subaru's approach maintains a fully connected mechanical all-wheel-drive system. The primary motor-generator replaces the starter motor, facilitating smoother auto stop/start functionality and enabling the gasoline engine to charge the compact 1.1-kilowatt-hour lithium-ion battery.