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      04-06-2007, 09:53 PM   #5
T Bone
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Originally Posted by ruff View Post
T Bone,
One of the most informative posts I have see in some time. I am still a bit confused about horsepower ratings 414 vs 420. I haven't seen different horsepower ratings on the RS4 or GT3. I heard it is rated by different measurements. Car and Driver stated 414. Please explain. Thanks.
420 is PS (another standard)
414 is SAE HP

I actually entered 309 KW into the software and it converted to SAE.....all the same.

From Wikipedia: PS is defined as 0.73549875 kW, or roughly 98.6% of SAE horsepower
"Aerodynamics are for people who cannot build engines"......Enzo Ferrari