Here's why:
* 1986 Honda Prelude Si: This model came equipped with a 1.8L 4-cylinder engine (B18A1) that produced around 108 horsepower.
* 1989 Honda Prelude Si: This model received an updated 2.0L 4-cylinder engine (B20A5) that produced around 135 horsepower.
Key Differences:
* Displacement: The 1989 engine had a larger displacement (2.0L vs 1.8L).
* Power Output: The 1989 engine was significantly more powerful.
* Engine Code: The engines had different engine codes (B18A1 vs B20A5).
Compatibility:
While the engines are not the same, some parts might be compatible. However, it's crucial to consult a mechanic or a Honda parts specialist to ensure compatibility before attempting any swap or replacement.