In 1990, the Honda Civic used two primary engine displacements depending on trim and market: a 1.5-liter inline-four for most models, and a 1.6-liter engine for the sportier Civic Si.
Launched as part of the fourth generation (1988–1991), the 1990 Civic offered the 1.5 L engine in base DX/LX trims and the 1.6 L engine in the Civic Si variant. Market-specific offerings could vary, but this captures the typical lineup for the year.
Engine sizes offered in 1990 Civic
Below are the two primary engine displacements that appeared in the 1990 Civic across common US-spec versions. The information reflects the era's typical options for this model year.
1.5-liter inline-four (D-series)
The 1.5-liter engine was the standard choice for most 1990 Civics, powering the base DX and LX trims in many markets. It belongs to Honda's D-series family, with versions like the D15B lineup used across different sub-variants by year and region.
- Common in DX and LX trims in North America and many markets.
- Engine family: D-series 1.5 L, denoted by codes such as D15B (various sub-variants by year and region).
In short, the 1.5-liter was the default engine size for the 1990 Civic's most widely sold variants.
1.6-liter inline-four DOHC (D-series)
The 1.6-liter option was reserved for higher-performance variants, notably the Civic Si, and was used in some export or high-trim configurations. This engine is a 1.6 L DOHC member of Honda's D-series family, commonly known by the D16A6 designation in many markets.
- Used in the Civic Si and some high-trim or export models in 1990.
- Engine code: D16A6 is the typical designation for the 1.6 L DOHC version in that era.
In summary, the 1990 Civic's engine sizes were primarily 1.5 L for most trims and a 1.6 L option for the Si and select models.
Summary
The 1990 Honda Civic offered two main engine displacements: 1.5 liters for the standard trims and 1.6 liters for the performance-oriented Civic Si. These varied by market and body style, reflecting Honda's approach to balancing efficiency and performance in the late 1980s and early 1990s.