The B18B1 refers to Acura’s 1.8-liter DOHC four-cylinder engine used in early Integra models, primarily in the US-market cars from around 1990 to 1993.
Overview of the B18B1
The B18B1 is part of Honda’s B-series family, characterized by a 1.8-liter displacement and a double overhead camshaft (DOHC) configuration. It is a non-VTEC variant, intended for entry-to-mid level trims, and sits in the lineage between the earlier B18A/A1 engines and the later VTEC-equipped B-series units. In North America, the B18B1 was used in the first-generation Integra line before VTEC-powered variants became common in later years.
Which Integra models used the B18B1
The following Integra variants were equipped with the B18B1 in the North American market during the early 1990s.
- 1990–1993 Acura Integra (US market) with the non-VTEC 1.8L engine
In brief, if you encounter an early Integra that lacks VTEC and has a 1.8-liter four-cylinder, there’s a strong likelihood it uses the B18B1 engine.
Key specifications and notes
To understand where the B18B1 fits, here are its core characteristics and context within the Integra lineup.
- Displacement: 1.8 liters
- Configuration: DOHC 4-cylinder
- VTEC: Non-VTEC variant
- Fuel system: Honda’s multi-point fuel injection (PGM-FI)
These attributes illustrate how the B18B1 served as a workhorse powerplant for early non-VTEC Integras, before higher-performance VTEC variants were introduced in later generations.
Summary
The B18B1 is the 1.8-liter DOHC non-VTEC engine that powered early North American Acura Integra models produced roughly between 1990 and 1993. It marks the era before VTEC-equipped variants became standard in subsequent Integra generations.