Few technologies have shaped modern motoring as profoundly as the diesel engine — and few have fallen from grace so swiftly. Once the backbone of European roads and the undisputed king of torque for commercial haulers worldwide, diesel now finds itself in an accelerating retreat. Tightening emissions rules, the rise of compelling electrified alternatives, and a reputation scarred by scandal have combined to put diesel on a countdown clock. The lineup of new diesel models shrinks with each passing model year, and the question is no longer if diesel will disappear from passenger cars, but when — with some industry voices, including a Toyota executive, pointing to roughly a decade as the end date for diesels. Even vehicles from unlikely corners of the market once embraced the technology — think the Porsche Cayenne, a performance SUV whose buyers are rarely motivated by fuel savings.
