[aerohead]

My rat's nest at home produced some data which throws a caution flag on the field of the so-called online horsepower calculator.
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Currently, the 2022 Rimac Nevera is the world's 'quickest' production automobile:
* At 4,750-pounds curb weight
* four motors
* all-wheel drive
* 1-speed transmission
* 1,914- horsepower total
* 1,741 lb-ft torque total ( constant over entire velocity range )
* 2.481- pounds / hp
* 0-60 mph in 1.85-seconds
* 0-100 mph in 4.3 seconds
* 1/4-mile = 8.52-seconds elapsed-time
* @ 167.51-mph.
* 258-mph top speed
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This is a 'real' car, tested in the real world, by qualified personnel, with as much precision as is likely to be experienced.
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All of which may be compared to an 'online' estimate of 1,820-hp for 4,000-lbs, at 180-mph in the 1/4-mile.