on the 92-96 vtec prelude the engine code is h22a1 while the 97-02 is h22a4 wut is the difference between the a1 and the a4

 

The a1 has 190hp and the 97-99 a4 has 195hp and the 00-01 a4 has 200hp

 

those are the HP differences, the mechanical differences are:

assume that the design is practically the same except for the things mentioned below.

h22a1 = closed deck block
h22a4 = open deck block (less rigidity and torsional strength)

h22a1 = OBD1
h22a4 = OBD2 (dif sensors, dif emmissions, dif ecu, etc)

im sure the gearing is different as well.

im gonna get in trouble for this but...
5th gen VTEC prelude runs a 15.4 quarter mile
4th gen VTEC prelude runs a 15.1 quarter mile

hey its on paper therefore its fact, i rest my case

~boomer

 

Just to throw a wrench into things.... the 96 h22a1 was OBD2.

 

the wherabouts of the 1996 h22a1 are rather uncertain, i have never seen an OBD2 h22a1, this could be due to the major recall honda had on all of their automobiles for the 1996 model year, they were also fined 1 million dollars by our federal government for failure to comply with the OBD2 parameters.
as i understand it, it was honda's dark day

~boomer

 

wut does obd stand for and wut does it mean to have a open or sloed deck