i always thought that i was getting 420 bhp but now im being told that its 420 at the flywheel,,,,what is it?!

The engine (crank) is rated for 420bhp, at the wheels (what you actually get/use)its under 400, not sure what it is exactly.

thanks

isn't bhp measured from the motor?

horsepower at the crankshaft is called braking horsepower (bhp). Wheel horsepower is called wheel horsepower. (whp)

The 420 hp figure is crank horsepower, you will dyno less to your wheels as a result of drivetrain loss. Most car manufacturers measure horsepower at the motor unless otherwise stated.

ORIGINAL: Flip

The 420 hp figure is crank horsepower, you will dyno less to your wheels as a result of drivetrain loss. Most car manufacturers measure horsepower at the motor unless otherwise stated.


Because it makes it look better ;)

pal dynoed his b7 rs4 221kw @ wheels thats about 300whp

^ seems about right. quattro losses about 25% through the tranny

Guys, its actually around 245kw atw, at least australian models. or 331 bhp whichever you prefer. Awesome for a quattro drivetrain, 20-30% loss of power.

Amazing congrats to the boys at Ingolstadt.

300 whp sounds kinda low. I was at Waterfest Saturday and a kid with a 04' S4 pulled 290 whp on the dyno with just a cat-back exhaust. That would put him at about 348 hp at the crank.