What kind of engine is in a 2021 Honda Civic?
In short, the 2021 Honda Civic uses two main four-cylinder engines depending on trim: a 2.0-liter naturally aspirated engine for the base models, and a 1.5-liter turbocharged engine for most higher trims. The Civic Si variant uses the same turbocharged engine but is tuned for higher output and paired exclusively with a six-speed manual transmission.
Beyond the quick answer, the 2021 Civic lineup differentiates engines by trim and purpose. Honda designed the 2.0L inline-four for efficiency and everyday driving, while the 1.5L turbo aims to deliver stronger performance without sacrificing fuel economy. The performance-focused Civic Si sits at the top end of the spectrum, offering more power and a manual gearbox to appeal to enthusiasts.
Engine options by trim
The following outlines the core engine choices across the 2021 Civic lineup.
- 2.0-liter inline-four (LX, Sport): Naturally aspirated, 158 horsepower and 138 lb-ft of torque; typically paired with a CVT (continuously variable transmission).
- 1.5-liter turbocharged inline-four (EX, EX-L, Touring): Turbocharged, about 174 horsepower and 162 lb-ft of torque; usually paired with a CVT in these trims.
- Civic Si (all Si trim): High-performance variant using the same 1.5-liter turbo, tuned for roughly 205 horsepower and 192 lb-ft of torque; exclusively paired with a 6-speed manual transmission.
In summary, the 2021 Civic offers two main four-cylinder engines—2.0L and 1.5L turbo—with the Si variant delivering higher output via a manual transmission for driving enthusiasts.
Transmission and driving notes
Most trims use Honda’s CVT to optimize efficiency, while the Civic Si trades the CVT for a traditional 6-speed manual transmission to enhance engagement and control at higher performance levels.
Summary
The 2021 Honda Civic’s engine lineup centers on two four-cylinder options: a 2.0-liter naturally aspirated engine for base models and a 1.5-liter turbo for most higher trims, plus a turbocharged variant tuned for the Civic Si that comes with a 6-speed manual. Power outputs range from 158 hp (2.0L) to about 174 hp (1.5L turbo) for standard trims, with the Si delivering around 205 hp. Transmission choices generally favor a CVT, except for the Si, which uses a manual gearbox.
Is the Honda 2.0 engine reliable?
Yes, the naturally aspirated Honda 2.0L engine is considered very reliable, with a reputation for longevity. However, the more recent turbocharged 2.0L engine (2.0T) has had some reports of early issues, such as fuel pump problems, although many owners report it is also reliable if properly maintained.
You can watch this video to learn why the Honda K20 engine is considered a reliable engine: 59sspeedkar99YouTube · Aug 19, 2024
Naturally aspirated 2.0L (e.g., K20C2)
- Reliability: This engine is widely considered to be very reliable, with many owners achieving 250,000 to 300,000+ miles with basic maintenance.
- Reputation: It's known for being a bulletproof and long-lasting engine that powers many base model Civics.
Turbocharged 2.0L (2.0T)
- Reliability: While many owners have had positive experiences, this newer engine has had more reported issues than the naturally aspirated version.
- Reported issues: Common problems include fuel pump failures and, in some cases, overheating or head gasket failure, though some of these issues may be linked to specific model years or modifications.
- Maintenance: Proper and regular maintenance is crucial for its longevity, especially with regard to engine temperatures and oil changes, say Reddit users.
What engine does my 2021 Honda Civic have?
Powerful, Fuel-Efficient 2.0-liter Engine (LX, Sport)
Honda engineers have taken another big leap in efficiency and power production with the 2.0-liter 4-cylinder. This DOHC gem features Variable Timing Control (VTC) on both the intake and exhaust camshafts.
What are the common problems with the 2021 Civic?
Owner Reported Trouble Spots
- Exhaust. Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
- In-car Electronics.
- Climate System.
- Engine Minor.
- Engine Major.
- Electrical Accessories.
- Brakes.
- Drive System.
Is a 1.5 or 2.0 engine better?
Neither engine is definitively "better"; the choice between a 1.5L and 2.0L engine depends on your priorities: a 1.5L engine is generally better for fuel economy, while a 2.0L engine is often better for performance and durability. A larger, turbocharged engine like a 2.0L provides more horsepower, torque, and better acceleration, making it feel more powerful and capable for tasks like towing, whereas a smaller 1.5L engine with a turbo can achieve better gas mileage.
1.5L Engine
- Pros: Better fuel economy, which can be more cost-effective for daily driving and commuting.
- Cons: May have less power for quick acceleration, towing, or high-demand situations. Early models of some 1.5L turbocharged engines had known issues like head gasket problems, though later models may have improved.
2.0L Engine
- Pros: More power, better acceleration, and more capability for heavy loads or towing. It is often built for durability, with some 2.0L engines being known for longevity.
- Cons: Generally has lower fuel efficiency compared to the 1.5L engine.
Which one to choose
- Choose the 1.5L if: Your priority is maximizing fuel efficiency and you primarily drive in the city or commute. It offers a good balance of performance for everyday use.
- Choose the 2.0L if: You want more power for a more engaging driving experience, frequently tow, or plan to drive the vehicle for a long time and prioritize engine longevity over fuel economy.
