When Ford radically redesigned its iconic Mustang for the 2015 model year, the car made many significant changes. One of these returned, where the Mustang went to a standard independent rear suspension for the first time in its existence. Another big change came under the hood, where Ford added the 2.3-liter turbocharged EcoBoost engine as the Mustang’s volume engine option. A few years later, with the old V6 removed from the lineup, the EcoBoost four-cylinder became – and still is – the Mustang’s base engine.
However, although it is the base engine and although it has irked some Mustang purists with its lack of displacement, it’s hard to argue that the Mustang’s 2.3 EcoBoost lacks power. The base model 2026 Mustang EcoBoost is rated at 315 horsepower, which is actually the same horsepower rating as the V8-powered 2010 Mustang GT, with the EcoBoost also outpacing previous V8 Mustang GTs from the ’90s and ’00s.
The latest Ford Mustang EcoBoost is a car that shows how far four-cylinder performance has come, but in the modern enthusiast market, it’s not even the most powerful four-cylinder option. To demonstrate, we’ve rounded up five different four-cylinder vehicles that have surpassed the Mustang in terms of horsepower, with a mix of cars that includes everything from hot hatchbacks to sport sedans, and even a crossover SUV.
Acura Integra Type S
In the 1990s and 2000s, high-performance Honda and Acura vehicles were known for their unique high-revving naturally aspirated engines. Today, however, Honda has fully embraced turbocharging and the powerful Honda Civic Type R is known as one of the fastest front-wheel drive cars in the world. In terms of horsepower rating, the 2.0-liter turbocharged four-cylinder powering the latest Civic Type R ties the Mustang EcoBoost with the same 315 horsepower rating, but Honda is building another hot hatch that actually edges them both out in the horsepower department.
That car is the very enjoyable Acura Integra Type S, which is a closely related and slightly more upmarket sibling to the Civic Type R, using the same platform and 2.0-liter turbo engine. While the Acura and Honda engines are basically identical, the Integra uses a more aggressive exhaust system, which increases its output by five horsepower, for a total of 320.
Head-to-head comparisons between the two Honda products show that the Integra isn’t enough to give the heavier Acura a performance edge, but both cars are still considered among the best hatchbacks you can buy. Notably, the Integra Type S compares very well to the Mustang EcoBoost in terms of performance, leaving buyers to choose between the precision and practicality of the Acura or the rear-wheel-drive personality of the Ford.
Cadillac CT4-V
With American automakers globally known for their V8 engines, one might expect most of the Mustang EcoBoost’s main four-cylinder rivals to come from German or Japanese brands, and that’s the case for most of the choices in this selection. However, Ford’s main rival, General Motors, also has its own very powerful four-cylinder engine – and both larger and more powerful than the Ford 2.3. That engine is GM’s 2.7-liter turbocharged four-cylinder, known as the L3B.
The 2.7 turbo is found primarily in Chevrolet and GMC pickup trucks, where its 310 horsepower falls just short of the Mustang EcoBoost’s output. However, in the Cadillac CT4-V high-performance sports sedan, the L3B receives some modifications that push its maximum output to 325 horsepower. The four-cylinder CT4-V isn’t on the same level as the flagship CT4-V Blackwing with its twin-turbo V6, but the regular CT4-V is still plenty quick, capable of hitting 60 miles per hour in under five seconds.
With the Cadillac CT4 discontinued at the end of the 2026 model year, GM will have to return the four-cylinder power crown to Ford, at least for now. Speculation suggests that GM is hard at work on a new lineup of rear-wheel drive models, potentially including a reborn version of the Mustang’s longtime rival, the Chevrolet Camaro. If and when these new GM models arrive, we wouldn’t be surprised to see a four-cylinder turbo engine option at least equal to the current L3B.
Volkswagen Golf R and Audi S3
Considered as a whole, today’s market doesn’t offer the same number of affordable performance cars that we’ve seen in decades past – but at least the hatchback segment is alive and well, with several excellent choices for enthusiasts. One such choice is the Volkswagen Golf R, which takes Volkswagen’s four-cylinder performance to a new level.
Sharing its DNA with the iconic Golf GTI, the Golf R significantly elevates the GTI’s performance, adding an all-wheel drive system and giving Volkswagen’s turbocharged 2.0-liter four-cylinder engine a major power boost. Already quick to start, Volkswagen updated the Golf R for the 2025 model year, increasing its output to 328 horsepower. With the aforementioned 4Motion AWD system, this well-equipped Volkswagen can hit 60 miles per hour in just four seconds, making the Golf R one of the fastest and most mature hatchbacks you can buy.
Additionally, if we’re talking about the Golf R, we also have to mention its closely related corporate cousin, the Audi S3. The S3 essentially packs the Golf R’s powertrain into a sedan and has the same 328 horsepower as its Volkswagen counterpart. With these German offerings, buyers can choose their preferred brand and body style, but either way, they’ll get one of the most powerful four-cylinder engines on the market today.
Porsche 718 Cayman S and Boxster S
With the legendary reputation of the Porsche 911 and its flat-six engine, some car enthusiasts may not associate Porsche with high-horsepower four-cylinder engines, but Porsche also made a few. The company has a long history of building impressive four-piston engines, and the engine in the Porsche 718 Cayman S and its Boxster S sibling is among the most powerful road-going examples on the market.
With a displacement of 2.5 liters, the flat four-cylinder engine that powers the 718 Cayman and Boxster S even develops 350 horsepower. When the car debuted in 2017, in Car & Driver testing, the Cayman S hit 60 miles per hour in just 3.6 seconds. What’s also unique about the 718’s four-cylinder engines is that, unlike the Mustang’s EcoBoost 2.3 and other inline-four engines on this list, Porsche’s flat-four design is specific to the Caymans and Boxsters, and not shared with other mainstream models.
Of course, some Porsche fans might recommend that you skip the four-cylinder models and go straight for the wonderful flat-six Cayman GTS or GT4, and there are plenty of reasons why one might want to do that. However, both on its own merits and in comparison to other four-cylinder engines on the market, the Porsche 2.5 is easily among the best on the market.
Toyota RAV4 plug-in hybrid
Given their relatively small displacement, it’s no surprise that the engines on this list – including the Ford 2.3 EcoBoost itself – all use turbocharging to achieve their impressive power levels. Toyota, however, has a powerful 2.5-liter four-cylinder that beats the Mustang’s power without using a turbocharger.
Instead, the 2026 Toyota RAV4 Plug-In Hybrid’s powertrain uses a combination of a four-cylinder internal combustion engine and three electric motors to produce a combined total of 324 horsepower. The result is one of the fastest mainstream compact crossover SUVs you can buy, capable of hitting 60 miles per hour in just five seconds.
Sure, the RAV4 PHEV’s high curb weight and family crossover DNA might prevent it from being a serious performance machine like other cars on this list might be, but the unexpected nature of its power is part of the fun. Beyond that, the RAV4 PHEV’s powerful setup shows that hybrid electrification can be just as transformative as adding a turbocharger to a four-cylinder engine. In the case of the RAV4, this can also significantly improve fuel efficiency.
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