The C-series is Honda's older inline-four engine family from the late 1980s through the early 2000s, spanning roughly 2.0 to 2.4 liters in displacement and used across a range of models before being superseded by the B- and K-series families.
In more detail, the C-series covers several 2.0–2.4 liter four-cylinder engines used in various Honda and Acura models during the period, with regional variations in naming and application. This article explains what defines the C-series, where you might encounter them, and how to identify the exact variant in a vehicle.
Origins and scope
The C-series was introduced as Honda expanded its four-cylinder lineup beyond earlier D-, E-, and D-series offerings. These engines were designed for mainstream reliability and broad use in a variety of body styles, appearing in markets around the world during the 1990s and into the early 2000s.
Representative engines in the C-series include several 2.0–2.4 liter inline-four variants that you may encounter in older Honda and Acura models. The exact variant and features vary by market and model year.
- C20A — about 2.0 liters; a common C-series variant used across multiple 1990s Honda/Acura applications.
- C22A — about 2.2 liters; another widely seen variant across different model lines and markets.
- C24A — about 2.4 liters; used in larger Hondas and some Accord/Prelude-era applications.
These representative engines illustrate the typical displacement range and configuration you’ll find in the C-series across markets and model lines. Specific ratings and features vary by variant and year, so confirm with the engine code on the block and the vehicle’s paperwork.
Key characteristics of the C-series
Across its variants, the C-series shared several design traits, though specifics vary by model year and market:
- Inline-four cylinder layout with varying valve trains (SOHC or DOHC depending on the variant and year).
- Displacements generally in the 2.0–2.4 liter range (C20A/C22A/C24A).
- Electronic fuel injection in later versions, with earlier iterations adopting the era’s fuel delivery tech.
- Used in a range of Honda/Acura models during the late 1980s–early 2000s; availability varied by region.
- Identification via the engine code starting with "C" stamped on the engine block and found in factory manuals and service data.
While there are commonalities, the precise configuration, power output, and features depend on the exact variant and year. If you’re restoring or repairing, verifying the engine code and cross-referencing the model year is essential.
How the C-series fits into Honda's lineup over time
As Honda advanced, its B-series and later K-series engines offered improved performance, efficiency, and modern electronics, making the C-series less common in new cars. Today the C-series is mostly encountered in older vehicles, classic restorations, or in markets where those cars remain on the road. Parts, manuals, and expertise are more specialized, but still accessible through enthusiast networks and vintage catalogs.
Summary
The C-series engine family represents Honda’s early-generation inline-four powerplants, generally ranging from 2.0 to 2.4 liters and appearing in a variety of models from the late 1980s through the early 2000s. While not used in current Honda lineups, these engines are well documented in service literature and remain of interest to collectors and restorers. Always verify the exact variant by checking the engine code and the vehicle’s model year and market origin.
What's the best month to buy a Honda?
The end of the year, particularly the months of November and December, can be a good time to purchase a Honda. This is because many dealerships offer special promotions and incentives to clear out their inventory before the new models arrive.
How much horsepower does a C30A engine have?
270 bhp
The DOHC VTEC C30A is a 2,977 cc (3.0 L) version, producing 270 bhp (274 PS; 201 kW) at 7,300 rpm and 284 N⋅m; 210 lbf⋅ft (29 kg⋅m) of torque at 6,500 rpm, with a 10.2:1 compression ratio.
What Honda engines to stay away from?
Honda Earth Dreams 1.5-liter Turbo-Four
Of all the engines on this list, the Earth Dreams 1.5-liter turbo-four might be the most problematic. It's used in a host of Honda's most popular vehicles, including the CR-V and Accord, as well as the less popular Civic Si.
What is a Honda B series engine?
The B-series are a family of inline four-cylinder DOHC automotive engines introduced by Honda in 1988.