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Pretty meaningless list that amounts to nothing more than a beauty contest or at best a power contest. It says nothing to how well the engine is built, how long it may last, the reliability, or quality. It's also not a exhaustive list and only considered engines submitted by manufacturers. Each limited to one entry or maximum of two if they met specific sales volumes.
... with scoring based on horsepower, torque, NVH management, observed efficiency and new technology onboard...
...For the 2025 program, each brand selling in the U.S. light-vehicle market was eligible to submit at least one nominee, with those having annual U.S. volume of 350,000 sales or more able to submit up to two nominees...
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.