The 2003 Nissan Altima has an inline 4 engine.
The 2003 Nissan Altima has a 2.5 L base engine size.
If it is the same engine (the I4 or V6)
The 2003 Nissan Altima's engine produces 180 ft-lbs. @ 4000 rpm.
The 2.5 litre four cylinder engine in a 2003 Nissan Altima has a timing CHAIN
is a 2.5 a interference motor
The 2003 Nissan Pathfinder's engine produces 240 hp @ 6000 rpm.
The 2003 Nissan Xterra's engine produces 143 hp @ 5200 rpm.
The 2003 Nissan Frontier's engine produces 143 hp @ 5200 rpm.
The 2003 Nissan Sentra's engine produces 126 hp @ 6000 rpm.
The 2003 Nissan Murano's engine produces 245 hp @ 5800 rpm.
The 2003 Nissan Maxima's engine produces 255 hp @ 5800 rpm.