While the standard for measuring and reporting engine output among OEMs is at the crankshaft, that isn’t necessarily the most accurate representation of what you get on the road. We don’t drive disembodied engines. We drive cars that take the power from the crankshaft, through a transmission, driveshafts, a differential, and, finally, the wheels and tires. Going through all that will result in some losses, and whatever you measure at the wheels is really what’s moving you. Hennessey put one of its insane Demon 1700s on a chassis dyno to show that wheel horsepower, and it’s still impressive, both in maximum and base boost settings.
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