If you’re into Hondas—or engine swaps in general—you’ve probably heard the name K24 tossed around with admiration. This 2.4L inline-4 engine from Honda’s legendary K-series family has earned a reputation for its mix of reliability, tunability, and surprising performance.
Whether you’re a weekend warrior building a Civic sleeper, someone comparing K-series engines, or a curious car owner wondering what powers your CR-V, this guide is for you. We’ll break down the different K24 variants, compare them to the K20, look at real-world reliability, and even touch on why it’s become such a popular choice for swaps.
What Is the Honda K24 Engine?
The Honda K24 is a 2.4-liter DOHC i-VTEC inline-4 engine that first appeared in the early 2000s. It’s part of the larger K-series family, which replaced Honda’s B-series engines and quickly became a favorite among enthusiasts and tuners.
Here are the basic specs shared by most K24 variants:
- Displacement: 2.4L (2354 cc)
- Bore x Stroke: 87 mm x 99 mm
- Valvetrain: DOHC i-VTEC (varies by model)
- Fuel System: Multi-point fuel injection
- Block/Head Material: Aluminum alloy
What makes the K24 special—especially in tuning circles—is its longer stroke compared to the K20, giving it more torque while still maintaining Honda’s high-revving nature.
K24 Engine Variants Explained
Not all K24s are created equal. Over the years, Honda released multiple K24 variants, each engineered with a different goal in mind—some focused on fuel efficiency, others built for high performance. These engines differ in terms of VTEC implementation, compression ratios, cam profiles, intake/exhaust flow, and even block design.
Below are the most notable K24 variants, along with their key features and ideal use cases:
| Variant | Found In | Power Output | Highlights |
|---|---|---|---|
| K24A1 | Honda CR-V (2002–2006) | ~160 hp / 162 lb-ft | Economy-focused; basic i-VTEC only on intake cam; great low-end torque for daily driving. No performance VTEC on the exhaust side. |
| K24A2 | Acura TSX (2004–2008) | ~200 hp / 166 lb-ft | Performance-tuned with high-lift cams, true VTEC on both intake and exhaust, higher compression (10.5:1), forged rods and crank. Very popular for swaps and tuning. |
| K24A4 / K24A8 | Honda Accord (2003–2007) | ~160–170 hp / 161 lb-ft | Designed for comfort and fuel economy; lacks high-performance VTEC, but solid torque and a reliable foundation for budget builds or turbo setups. |
| K24Z3 | Honda Accord (2008–2012) | ~190 hp / 162 lb-ft | Improved intake manifold and higher redline. Slightly more modern architecture but fewer tuning options due to integrated exhaust manifold. |
| K24Z7 | Civic Si (2012–2015) | ~205 hp / 174 lb-ft | Sportiest of the Z-series; dual VTC and 11:1 compression. Decent performer but limited aftermarket compared to A2. Exhaust design makes header swaps harder. |
Let’s break that down further:
- K24A1 is your budget-friendly, get-the-job-done engine. It’s extremely reliable and easy to find, making it a common pick for basic K-swaps—especially when paired with a K20 head for performance.
- K24A2 is often called the “gold standard” of the K24 lineup. It comes from the Acura TSX, and enthusiasts love it for its higher rev limit (~7100 RPM), VTEC on both cams, and stronger internals—ideal for N/A builds or light turbo applications.
- K24A4 and A8 offer a good balance of economy and torque. While they don’t have performance VTEC, they’re a great starting point for a budget swap or turbo build. Many people use these bottom ends for hybrid builds with K20 heads.
- K24Z-series engines are found in newer models and offer slightly more power and modern emissions features. However, tuning these can be trickier due to their integrated exhaust manifolds and less aftermarket support. That said, the K24Z7 in the Civic Si still packs a punch and holds its own for spirited driving.
Quick tip: If you’re planning a swap and want the most straightforward tuning path with the best results, stick with the A-series—especially the K24A2. If you’re just after a durable daily engine or a budget turbo base, the A4 or A8 can’t be beat.
What Cars Have the K24 Engine?
You might be surprised at just how many vehicles use the K24. It’s not just reserved for performance sedans—Honda packed it into family haulers, crossovers, and even wagons.
Here’s a quick list of notable models:
- Honda CR-V (2002–2014) – K24A1, K24Z1, etc.
- Honda Accord (2003–2012) – K24A4, K24Z3
- Acura TSX (2004–2008) – K24A2
- Honda Element – K24A4
- Honda Odyssey (JDM) – Certain trims
- Civic Si (2012–2015) – K24Z7
So, if someone asks, “What Hondas have the K24?”—the answer is, quite a few! It’s one of Honda’s most versatile engines, used across a wide range of body styles and purposes.
Which K24 Engine Is the Best?
This is the hot question—and the answer depends on what you’re planning to do.
- For performance builds: Go with the K24A2 (found in the TSX). It offers the best mix of power, stronger internals, and a high-performance VTEC system.
- For budget swaps: The K24A4 is easy to find and cheap, making it a great starting point if you’re planning to build it up.
- For newer builds or daily drivers: The K24Z7 (Civic Si) and K24Z3 (Accord) bring newer tech, although they’re slightly less desirable for high-performance tuning due to design differences.
If you’re just looking for a reliable daily engine, almost any K24 will do. But if you’re chasing horsepower, stick with the A2—or build a frankenstein hybrid with K20 heads (a “K24/K20” swap, more on that later).
K24 vs K20: Which Engine Is Better?
Another common debate in the Honda community is the classic K24 vs K20 question. And the truth is—it really depends on what you’re after.
Power & Torque
The K24 has the upper hand in torque thanks to its longer stroke and higher displacement (2.4L vs 2.0L). That means better low-end pull, which is great for street driving, especially in heavier cars like the Accord or CR-V.
The K20, on the other hand, is a rev-happy engine. With a shorter stroke and often higher redlines, it shines in high-RPM track driving.
Tuning Potential
Here’s where it gets interesting: many enthusiasts build K24/K20 hybrids, taking the torquey K24 bottom end and pairing it with a high-revving K20 head. It’s the best of both worlds—power down low and VTEC screams up high.
Cost and Availability
K24s are generally more available and affordable, especially in junkyards or from CR-Vs and Accords. K20Z3s or Type R variants can be pricey and harder to come by.
Verdict: If you want streetable torque and easy sourcing, go K24. If you’re building a track car and love to rev, K20 is still a strong choice. For tuners? A K24/K20 combo is the dream setup.
How Reliable Is the K24 Engine?
Let’s get this straight: the K24 is a workhorse. Honda nailed it when it comes to building a reliable, long-lasting 4-cylinder. These engines are known to push well over 250,000 miles with basic maintenance.
Known Strengths:
- Timing chain (no belt replacements)
- Aluminum construction = lighter engine
- Smooth power delivery
- Handles high mileage with grace
Common Issues (Though Minor):
- VTC actuator noise on cold start (mainly K24Z engines)
- Oil leaks from the valve cover or VTEC solenoid gasket
- Cracked exhaust manifolds on some variants
Nothing major—most issues are easily manageable and don’t interfere with long-term performance.
Pro tip: Stick to regular oil changes and coolant flushes. If you’re running it hard or boosting it, invest in better internals and a quality tune.
Why Is the K24 So Powerful and Popular?
If you’ve ever wondered why the K24 shows up in everything from Civics to Miatas to Lotus track cars, here’s why:
1. It’s Naturally Potent
Even in stock form, the K24 makes respectable horsepower (160–205 hp) and torque. With simple bolt-ons and tuning, it can crack 230+ hp. Turbo builds? 400+ isn’t unheard of.
2. Aftermarket Support
There’s a huge ecosystem of parts—intakes, headers, cams, pistons, you name it. K24 engines are Lego blocks for tuners.
3. Easy to Swap
Thanks to similar engine mounts and a strong aftermarket, K24s can drop into Civics, Integras, and even FR cars like the Miata or BRZ with the right kit.
4. Strong Bottom End
The K24’s longer stroke and beefy bottom end mean it holds up well under pressure. Many use it as a turbo foundation.
In short: it’s powerful, cheap, tunable, and reliable—what more could you want?
K24 Engine Swap Guide
The K-swap movement is one of the most popular in the import scene—and the K24 is at the heart of it. Here’s what makes it such a go-to:
Why K24 for Swaps?
- Affordable: CR-V and Accord engines are easy to find at a low cost.
- Torque-rich: Great for street use.
- Compatible: K-series engines bolt into Civics and Integras with available kits.
- Upgrade-friendly: Combine with K20 head for max revs.
Popular Swap Targets:
- Honda Civic EG/EK/EP3
- Acura RSX
- Honda Integra
- Mazda Miata (with adapter kits)
- Toyota GT86 / Subaru BRZ (advanced builds)
Things to Consider:
- ECU and wiring harness
- Mounts and axles
- Transmission and shifter compatibility
- Tuning after the swap
Whether you’re building a track monster or a weekend sleeper, the K24 offers huge bang for your buck in the swap game.
FAQ
What Hondas have the K24 engine?
You’ll find the K24 engine in models like the Honda CR-V, Accord, Element, Civic Si (2012–2015), and Acura TSX (2004–2008). It’s used across a wide range of vehicles thanks to its balance of performance and reliability.
Which K24 engine is the best?
The K24A2 from the Acura TSX is often considered the best. It features high-lift cams, VTEC on both intake and exhaust, forged internals, and around 200 hp—making it ideal for both daily driving and tuning.
Which is better, K20 or K24?
K20 engines rev higher and are great for racing, while the K24 offers more torque and is better for street builds. Many enthusiasts combine both in a K24/K20 hybrid for the best performance.
What K24 is in the CR-V?
Most CR-Vs (2002–2006) came with the K24A1, a reliable, torque-focused engine with basic i-VTEC—perfect for daily use, though not designed for high performance.
How long does a K24 engine last?
With proper maintenance, the K24 can easily run 200,000 to 300,000 miles. It’s known for its durability, timing chain setup, and strong internal design.
Final Thoughts: Is the K24 the Best Honda Engine Ever?
It might be a bold claim—but many would argue yes.
The K24 engine blends Honda’s legendary reliability with real-world torque and incredible tuning potential. Whether you’re commuting, autocrossing, or planning a full K-swap, the K24 has proven itself time and again as a versatile powerhouse.
It’s not just great for daily drivers—it’s a star in the performance and swap world, trusted by tuners, racers, and engine builders alike.
If you’re looking for an engine that can do it all—cruise past 200,000 miles without a hiccup, or light up a dyno with boost and VTEC—then the K24 deserves a top spot on your list.
About Us
At Nanjing Woda Auto Technology Co., Ltd., we specialize in supplying high-quality engine parts and performance solutions for the global aftermarket. With over 25 years of experience in the automotive industry, we serve professional buyers, distributors, and performance shops worldwide—offering reliable components for engines like the Honda K24, K20, and beyond.
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