Jeep Compass e-Hybrid's new gasoline engine enhances reliability

Stellantis has unveiled an all-new gasoline engine for the Jeep Compass e-Hybrid, designed to replace the problematic 1.2 PureTech unit from the previous generation. This completely new powertrain, a key element of the refreshed model, is a 1.2-liter three-cylinder turbo developed through a collaborative effort by engineers from Italy, France, and Germany.

The primary goal was to enhance reliability and comfort while maintaining efficiency. To achieve this, the engine features a variable-geometry turbocharger, direct fuel injection operating at up to 350 bar, variable valve timing on both intake and exhaust, and a timing chain. This last detail matters because it marks a shift from the previous oil-bathed belt system, which had drawn criticism.

Engineers also focused on reducing vibrations and noise. Thanks to a balancer shaft and refinements to the piston assembly, the motor now offers a level of comfort comparable to four-cylinder units.

The hybrid system follows a 48-volt architecture. A 21 kW electric motor, integrated into the eDCT gearbox, supplements the 136-horsepower gasoline engine. Combined output reaches 145 hp, with a top speed of 195 km/h. In practice, these solutions show that manufacturers continue to refine traditional internal combustion engines, integrating them into hybrid setups. Stellantis has clearly learned from past mistakes.

The switch to a timing chain and the new overall architecture represent an attempt to rebuild trust in the powertrain. Ultimately, real-world performance will be the true test, not just the specifications on paper.