What engine does RSX have?
The RSX uses a 2.0-liter inline-four with two main variants: the Base RSX with a K20A3 engine (~160 hp) and the RSX Type-S with a K20A2 engine (~210 hp).
Overview of the RSX engine lineup
The Acura RSX, sold in North America from 2002 to 2006, came in two trims in its final generation: Base and Type-S. Both models used Honda’s K-series 2.0-liter family, but with different tuning and goals—everyday practicality for the base and higher-revving performance for the Type-S.
Below is a quick breakdown of the two engine options, including approximate horsepower and typical transmission choices.
- Base RSX — 2.0L i-VTEC K20A3, producing about 160 hp and roughly 141–143 lb-ft of torque. Typically paired with a 5-speed manual or a 4-speed automatic in early years.
- RSX Type-S — 2.0L i-VTEC K20A2, producing about 210 hp and around 142 lb-ft of torque. Standard with a 6-speed manual, with only minor year-to-year variation.
Note: Figures reflect common U.S.-spec specs. Regional differences and year-by-year tuning can yield small variations in output.
Where the engines come from and how they work
The RSX engines are part of Honda’s K-series family, designed to deliver a balance of high-revving performance and efficiency. The Base RSX uses the K20A3 variant, which emphasizes smooth, everyday drivability, while the Type-S uses the higher-revving K20A2 variant for more aggressive performance. Both engines employ i-VTEC, which adjusts valve timing to optimize power across the RPM range.
Maintenance considerations for RSX engines
Because the RSX relies on widely used K-series engines, parts availability remains strong on the used market. Key maintenance topics include regular spark plug replacement, checking the timing chain (the K-series uses a chain, not a belt), and routine oil changes with a quality synthetic oil. Pay attention to service history and any signs of oil consumption or misfires, which can indicate wear on older engines.
In terms of driving character, the Base RSX offers a refined, approachable experience, while the Type-S delivers a more aggressive, high-revving profile thanks to its K20A2 tuning.
Summary
The RSX lineup centers on two 2.0-liter i-VTEC engines: the Base RSX with the K20A3 and the RSX Type-S with the K20A2. Together, they reflect Honda’s early-2000s approach to blending practical everyday usability with enthusiast-oriented performance in a compact, front-wheel-drive package.
If you’re shopping for an RSX today, confirm which engine code it carries—K20A3 for the base model (roughly 160 hp) or K20A2 for the Type-S (roughly 210 hp)—to understand the driving experience and maintenance considerations you’ll face.
