2026 Jeep Grand Cherokee Specs, Price, and Release Date: Full Breakdown 2026 Jeep Grand Cherokee Specs, Price, and Release Date: Full Breakdown Stellantis just raised the bar for turbocharged four-cylinder engines. Meet the Hurricane 4 Turbo a brand-new 2.0L inline-four that brings cutting-edge combustion technology to the mainstream SUV segment. And it’s making its debut in the refreshed 2026 Jeep Grand Cherokee, revealed today as part of Jeep’s bold push into smarter, more powerful efficiency. This isn’t just another small-displacement turbo. It’s one of the first mass-produced engines to feature Passive Turbulent Jet Ignition (TJI) a breakthrough system designed to unlock higher performance and better fuel economy without demanding premium fuel. At the heart of the Hurricane 4 Turbo is Stellantis’ innovative TJI system, which uses a cup-like pre-chamber above each cylinder to initiate ignition. Here’s how it works: The spark plug fires inside the pre-chamber Flames jet throug...