What kind of engine is in a Subaru Ascent?
The Subaru Ascent is powered by a 2.4-liter turbocharged flat-four (boxer) engine, delivering about 260 horsepower and 277 lb-ft of torque when run on premium fuel. It is paired with Subaru’s continuously variable transmission (CVT) and standard all-wheel drive.
Engine design and configuration
In North American-spec Ascent models, Subaru uses a compact, horizontally opposed four-cylinder engine. The 2.4-liter turbocharged boxer layout keeps the engine’s mass low and evenly distributed, contributing to the vehicle’s balanced handling for a three-row SUV. The engine belongs to Subaru’s newer FA-series family, which emphasizes direct fuel injection, a twin-scroll turbocharger, and intercooling to improve response and efficiency.
Boxer configuration and turbocharging
The distinctive flat-four (boxer) design means opposing cylinders lie flat on either side of the crankshaft. When paired with a twin-scroll turbocharger, this setup helps reduce turbo lag and deliver strong mid- and upper-RPM torque, which is beneficial for highway merging and carrying passengers and cargo.
Performance figures and fuel considerations
Output is about 260 hp and 277 lb-ft of torque with premium-grade fuel. Subaru specifies premium fuel to achieve the engine’s rated performance, though some markets or trims may tolerate regular fuel with slightly different output. Efficiency varies with drivetrain configuration and year, but the engine is designed to provide a practical balance of power for daily driving and family use.
Transmission and drivetrain context
The 2.4-liter turbo engine is typically paired with Subaru’s CVT, and most Ascent models come with symmetrical all-wheel drive as standard. This combination aims to deliver smooth acceleration, steady traction in a variety of conditions, and adequate towing capability when properly equipped—typically up to about 5,000 pounds for models configured with the turbo engine and towing package.
What to know for owners and buyers
For best results, use the octane recommended by Subaru for the turbo engine (usually premium 93 octane in markets that specify it). Routine maintenance—especially timely oil changes and turbo-related service—helps preserve performance and reliability. Always check the exact specs for your model year and market, as there can be minor variations in output and recommended fuel.
Summary
The Subaru Ascent relies on a 2.4-liter turbocharged flat-four engine to provide robust power for a three-row SUV, delivering around 260 hp and 277 lb-ft of torque with premium fuel. This engine, paired with a CVT and standard all-wheel drive, emphasizes low center of gravity, smooth response, and practical towing capability, making the Ascent well-suited to family use and everyday driving.
What are the weaknesses of the Subaru Ascent?
Common Subaru Ascent cons include poor fuel economy, a CVT (continuously variable transmission) that can feel disconnected and noisy, and brake issues like premature wear and juddering. Other drawbacks cited by owners are limited interior cabin width, inconsistent technology and infotainment, and engine noise, particularly under acceleration. Some owners also report issues with electrical systems, and despite a decent engine, some feel it is underpowered for the vehicle's size, particularly with its CVT.
You can watch this video to learn about the common problems and weaknesses of the Subaru Ascent: 52sNexologyYouTube · Sep 11, 2025
Performance and powertrain
- Poor fuel economy: Some owners report fuel economy that is worse than advertised.
- Underpowered engine: The turbocharged 2.4-liter engine is often considered underpowered for the Ascent's heavy weight.
- Noisy CVT: The CVT can cause a "droning" noise and a disconnected feeling, while competitors use more traditional automatic transmissions.
- Inconsistent throttle: Some drivers find the throttle too touchy at low speeds or sluggish at higher speeds.
Brakes
- Premature wear: Owners report premature wearing of brake pads and rotors.
- Vibration and noise: Complaints include pulsating or vibrating brakes and squeaking noises.
Interior and technology
- Limited interior width: Despite being a large SUV, the cabin is narrower than many competitors, reducing usable space for passengers.
- Frustrating technology: Some owners find the technology and infotainment systems frustrating to use.
- Driver assist system issues: In some conditions, such as heavy rain, the EyeSight driver assist system can shut down.
Other issues
- Engine and transmission problems: In addition to the CVT, other engine and transmission-related issues have been reported by owners.
- Electrical system issues: Reports include problems with interior lights and other electrical components.
- Repairs: Some owners report that repairs for certain issues, like replacing a windshield, can be expensive and trigger other cascading problems.
This video discusses several issues with the Subaru Ascent, including the CVT, brake problems, and electrical system: 1mFuel ForceYouTube · Aug 4, 2025
Does the Subaru Ascent have a good engine?
The Ascent is a very functional, easy-to-live-with three-row midsized SUV. Its turbocharged four-cylinder engine delivers ample power in daily driving and gets 22 mpg overall. The jumpy initial takeoff takes some getting used to, however.
What Subaru has a Toyota engine?
Subaru BRZ
Notably, the Subaru BRZ and Toyota 86 sports cars are joint efforts, blending Subaru's boxer engine expertise with Toyota's engineering and marketing strengths.
What engine does the Subaru Ascent use?
The Subaru Ascent uses a 2.4-liter turbocharged SUBARU BOXER® 4-cylinder engine that produces 260 horsepower and 277 lb-ft of torque across all trim levels. This engine is paired with a Lineartronic® CVT (Continuously Variable Transmission) and comes standard with Symmetrical All-Wheel Drive. It has a maximum towing capacity of 5,000 pounds.
This video provides an overview of the Subaru Ascent engine, including its features and performance: 58sAutomotive Anonymous YouTube · Feb 15, 2025
Engine specifications
- Type: 2.4L turbocharged SUBARU BOXER® 4-cylinder
- Horsepower: 260 hp
- Torque: 277 lb-ft
- Transmission: Lineartronic® CVT with 8-speed manual mode
- Drivetrain: Standard Symmetrical All-Wheel Drive
Performance features
- Towing Capacity: Up to 5,000 pounds
- X-MODE®: Enhances performance on low-friction surfaces by optimizing engine output and the all-wheel drive system
- Hill Descent Control: Included on most trims for controlling descent on steep inclines
- Trailer Stability Assist: Helps to keep the trailer stable while towing
