The Subaru Outback VI (BT) 2.5i, produced from July 2021 to April 2022, represents a key iteration of Subaru’s popular all-wheel-drive wagon. Positioned as a mainstream offering within the sixth-generation Outback lineup, it aimed to balance capability, comfort, and fuel efficiency for the North American market, where the Outback has consistently been a strong seller. This variant, equipped with a 2.5-liter naturally aspirated boxer engine and a Lineartronic continuously variable transmission (CVT), served as the volume leader for the BT generation, appealing to a broad range of buyers seeking a versatile family vehicle.
| Brand | Subaru |
| Model | Outback |
| Generation | Outback VI (BT) |
| Type | 2.5i (188 Hp) AWD Lineartronic |
| Start of production | July, 2021 |
| End of production | April, 2022 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.3 l/100 km (25.3 US mpg) |
| Fuel consumption (extra urban) | 6.2 l/100 km (37.9 US mpg) |
| Fuel consumption (combined) | 7.3 l/100 km (32.2 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.6 sec |
| Acceleration 0 – 62 mph | 9.6 sec |
| Acceleration 0 – 60 mph | 9.1 sec |
| Maximum speed | 206 km/h (128 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 9.2 kg/Hp |
| Weight-to-torque ratio | 7.1 kg/Nm |
| Power | 188 Hp @ 5800 rpm |
| Torque | 245 Nm @ 3400-4600 rpm (180.7 lb.-ft. @ 3400-4600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | FB25 |
| Engine displacement | 2498 cm3 (152.44 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Boxer |
| Cylinder Bore | 94 mm (3.7 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 12:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Valvetrain | DOHC |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 1733-1757 kg (3820.61 – 3873.52 lbs.) |
| Max. weight | 2200 kg (4850.17 lbs.) |
| Max load | 443-467 kg (976.65 – 1029.56 lbs.) |
| Trunk (boot) space – minimum | 522 l (18.43 cu. ft.) |
| Trunk (boot) space – maximum | 1797 l (63.46 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Length | 4870 mm (191.73 in.) |
| Width | 1875 mm (73.82 in.) |
| Height | 1670-1675 mm (65.75 – 65.94 in.) |
| Wheelbase | 2745 mm (108.07 in.) |
| Front track | 1570 mm (61.81 in.) |
| Rear track | 1600 mm (62.99 in.) |
| Ride height (ground clearance) | 213 mm (8.39 in.) |
| Minimum turning circle | 11 m (36.09 ft.) |
| Drivetrain | All wheel drive (4×4) |
| Number of gears | Continuously Variable (Lineartronic) |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Tires size | 225/60 R18 |
| Wheel rims size | 7J x 18 |
Powertrain & Engine Architecture
The heart of the 2.5i Outback is the FB25 2.5-liter naturally aspirated four-cylinder boxer engine. This engine, a hallmark of Subaru engineering, features horizontally opposed pistons, contributing to a low center of gravity and reduced vibration. The FB25 utilizes direct fuel injection, optimizing combustion efficiency and power delivery. The engine’s valvetrain employs Dual Overhead Camshafts (DOHC) with four valves per cylinder, further enhancing breathing and performance. Paired with this engine is Subaru’s Lineartronic CVT, a continuously variable transmission designed to provide smooth, efficient power transfer. Unlike traditional stepped automatic transmissions, the Lineartronic CVT uses a belt and pulley system to offer an infinite number of gear ratios within its operating range. This allows the engine to operate at its most efficient RPM for any given driving condition. The Lineartronic transmission in the BT Outback also features simulated “shifts” to provide a more familiar driving experience for those accustomed to conventional automatics.
Driving Characteristics
The 2.5i Outback with the Lineartronic CVT delivers a comfortable and predictable driving experience. While not overtly sporty, the 188 horsepower and 180.7 lb-ft of torque provide adequate acceleration for everyday driving and highway merging. The CVT is programmed to mimic traditional gear changes, reducing the “rubber band” feel often associated with CVTs. However, aggressive acceleration will still reveal the CVT’s characteristic engine drone. Compared to the turbocharged 2.4-liter engine option available in some Outback trims, the 2.5i offers less outright performance, but it provides a more linear power delivery and generally better fuel economy. The standard symmetrical all-wheel drive system provides excellent traction in various weather conditions, a key selling point for the Outback.
Equipment & Trim Levels
The 2.5i trim level typically included a comprehensive suite of standard features. These generally included Subaru’s EyeSight driver-assist technology (including adaptive cruise control, lane departure warning, and automatic emergency braking), a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, automatic climate control, and power-adjustable driver’s seat. Interior upholstery was typically cloth, with options for leather available as upgrades. Common optional extras included a power sunroof, premium audio system, and various exterior styling packages. The 2.5i served as the entry point to the Outback range, offering a well-equipped vehicle at a competitive price point.
Chassis & Braking
The Outback VI utilizes a unibody construction with independent suspension all around. The front suspension employs a McPherson strut design, while the rear features a double-wishbone setup. This configuration provides a comfortable ride and predictable handling. The 2.5i models were equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock Braking System (ABS) was standard, enhancing safety and control during emergency braking situations. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The 2.5i Outback was generally well-received by automotive critics. It was praised for its spacious interior, comfortable ride, standard safety features, and excellent all-weather capability. Critics noted that the engine, while adequate, wasn’t particularly exciting, and the CVT transmission could feel somewhat unrefined under hard acceleration. Compared to other trims in the Outback lineup, the 2.5i offered the best fuel economy and a lower price of entry, making it an attractive option for budget-conscious buyers. Its reliability was generally considered good, consistent with Subaru’s reputation for building durable vehicles.
Legacy
The FB25 engine and Lineartronic CVT combination in the 2021-2022 Subaru Outback VI 2.5i have proven to be relatively reliable powertrains. While some owners have reported minor issues with the CVT, such as occasional shuddering, these are not widespread. On the used car market, these Outbacks represent a good value proposition, offering a well-rounded package of practicality, safety, and capability. The continued demand for used Outbacks is a testament to the model’s enduring appeal and Subaru’s strong brand reputation. The 2.5i variant, in particular, remains a popular choice for buyers seeking a dependable and affordable all-wheel-drive wagon.
