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      10-07-2011, 03:24 PM   #20
Dr-Euro
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Drives: BMW
Join Date: Oct 2011
Location: Southern California

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Quote:
Originally Posted by yxc145 View Post
why does BMW claim that 535 has 300 HP? can someone explain the logic behind this?
Car manufactures rate horse power off the crank - this is considered BHP/BTQ or brake horse power/brake torque and is calculated on an engine dyno. As Enthusiast, we are only concerned with the power the reaches the wheels. There is a percentage of power lost in the drivetrain (10-20%) - this is called drivetrain loss. The power that is measured at the wheels is WHP/WTQ or wheel horse power/wheel torque.
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