For the Ford 5.4 liter Triton V8 ( Triton is the name Ford uses for their truck engines )
It really depends on what model and what model year
For example :
A 1997 Ford F-150 , 5.4 is rated at ( 235 horsepower )
A 2010 Ford F-150 , 5.4 is rated at ( 310 horsepower ) * 320 on E-85
The ( 2001 ) Ford Mustang 3.8 liter has ( 190 horsepower )
The 4.6 liter is ( 215 horsepower ) and the 5.4 liter is ( 230 horsepower ) in a 1997 Ford Expedition
260 horsepower
The 5.4 L with the 3 valve cylinder heads has 300 horse power
200 to 350 hp
210 horsepower ( according to the Owner Guide )
140 horse power @ 4600 rpm
165 kw or 221 hp
I believe the 2004 is rated at 300 horsepower
I believe the 5.4 liter V8 engine in a 2007 Ford F-150 is rated at ( 300 horsepower from the factory )
According to my Consumer Guide book : The 5.4 in a 2001 Ford Expedition is rated at ( 260 horsepower )
The 3.8 liter V6 has 190 horsepower ( the 4.6 liter V8 in the 2000 Ford Mustang GT has 260 horsepower )