* Minor internal component changes: Things like piston design, camshaft profiles, or slight alterations to the cylinder heads could have been tweaked for improved performance, emissions, or reliability. These changes might not be readily apparent without a detailed parts comparison.
* Emissions system differences: Emissions regulations often change year-to-year, so the 1996 model likely had some updates to its catalytic converter, sensors, or other emission control components to meet stricter standards.
* Engine management system (ECM) changes: The computer controlling the engine (the ECM or PCM) could have received software updates or hardware revisions to fine-tune performance, emissions, or address any known issues from the previous year's model. This could lead to slight differences in power delivery and fuel efficiency.
* Other related parts: While not strictly *engine* differences, related components like the intake manifold, throttle body, or other sensors might have minor revisions from year to year.
In short, while the fundamental architecture of the engine remains the same, there are likely subtle differences between the 1995 and 1996 versions. These differences are usually not significant enough to be immediately noticeable, but they do exist at the component and calibration level. To know precisely what the changes are, you'd need to consult detailed parts catalogs or service manuals for both years.
