What is the real BHP for a 4.2 AJP?

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I'm curious as I was looking through the history and found a dyno print out after Joolz re-mapped the car for the previous owner. I must admit I was slightly disappointed/shock with the number. It feels faster and I'm sure I real somewhere that they should achieve a much higher figure. The reality is it is plenty fast enough and I wouldnt want it any faster, but was wondering, what do other 4.2's really run at?

As far as I can tell my car has a Joolz remap with inlet porting and an ACT exhaust with no cats.

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Thank you for that link. Mine is 360.4bhp so actually quite good in comparison.

Thanks again.

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Byker28i said:

360 is good, it should pull like a train and you really wouldn't notice the extra few horses. What you do get is a smooth delivery throughout the curve.

It certainly is smooth and feels fast enough. Its currently at Str8six having suspension setup and new brakes so I can actually use the power.....

Looking forward to getting it back (not looking forward to getting the bill!)

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Demondad said:

Not forgetting later 4.2's are 4.5's as I am told. Mine has standard exhaust and no mapping, 2003. At bring your horses a while back it clocked 364 much to my suprise. It does go well!

Mine is a very early 4.2 .....

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Brummmie said:

0-160 is around 15-16secs here..

https://www.youtube.com/watch?v=w4YA9KNSZAc

160mph in 4th gear??!! st me thats fast!