The short answer is that there isn’t a single horsepower figure for “2.4 i-VTEC.” The 2.4-liter i-VTEC family spans multiple Honda and Acura models and generations, and output varies by engine variant, market, and year. In general, you’ll see roughly 160–170 horsepower in the more common 2.4L configurations, with higher-output versions around 205 hp.
What is the 2.4 i-VTEC engine?
The 2.4 i-VTEC is Honda’s 2.4-liter inline-four family that uses variable valve timing with intelligence (i-VTEC) to optimize both efficiency and performance. Different generations and market versions used slightly different sub-variants of the K-series 2.4L engine, which is why horsepower can vary even if the displacement remains the same.
Variants by model (typical horsepower figures)
Below are representative examples of common 2.4 i-VTEC configurations across popular Honda/Acura models. Numbers reflect widely cited figures for typical US-market setups and may vary by year, emissions package, and transmission.
- Acura TSX (2004–2008): approximately 205 horsepower
- Honda Accord 2.4L i-VTEC (roughly 2003–2007): about 160–166 horsepower
- Honda CR-V (mid- to late-2000s 2.4L i-VTEC): around 166 horsepower
- Honda CR-V (early 2010s, 2.4L variants in some markets): roughly 185 horsepower
The takeaway is that “2.4 i-VTEC” covers a family of engines, not a single spec. If you need the exact figure for a specific car, check the engine code (such as K24A, K24Z, etc.) and the official spec sheet for that year and market.
What factors influence horsepower numbers?
Power outputs aren’t fixed and can change for several reasons beyond the base displacement and valve timing. Understanding these factors helps explain why two cars with the same engine size can have different horsepower ratings.
- Engine code and variant: Different sub-variants (A, Z, etc.) have different tuning and internals.
- Market and emissions tuning: US, European, and Japanese versions often have different exhaust, intake, and ECU calibrations.
- Transmission type: Manual vs. automatic and gear ratios can affect measured horsepower and peak power RPM.
- Model year and revisions: Mid-cycle updates can raise or modify output through tuning or hardware changes.
- Fuel, altitude, and testing conditions: Real-world output varies with fuel quality and atmospheric conditions; published numbers assume standard test conditions.
In practice, if you’re evaluating a used car, pulling the exact horsepower figure for that specific vehicle requires the precise model year, market, and engine code. This ensures you’re comparing apples to apples within the 2.4 i-VTEC family.
Summary
The 2.4 i-VTEC family produces a range of horsepower figures rather than a single number. Typical outputs sit around 160–170 hp for many standard 2.4L configurations, with high-output variants such as the Acura TSX delivering about 205 hp. To know the exact HP for a given car, identify the engine code and consult the manufacturer’s spec for that year and market. In all cases, the 2.4 i-VTEC represents a versatile engine family used across multiple Honda and Acura models with varying tuning and performance characteristics.