The Subaru Justy IV 1.0i (70 hp) was a subcompact hatchback produced by Subaru from 2007 to 2011. Representing the fourth generation of the Justy, this model was a significant departure from its predecessors, being a rebadged Daihatsu Sirion/Boon. It primarily served as an entry-level offering in European and Asian markets, aiming for affordability and fuel efficiency. This particular 1.0i variant, equipped with a five-speed manual transmission, occupied the base trim level within the Justy IV lineup.
Technical Specifications
| Brand | Subaru |
| Model | Justy |
| Generation | Justy IV |
| Type (Engine) | 1.0i (70 Hp) |
| Start of production | 2007 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.1 l/100 km (38.6 US mpg, 46.3 UK mpg, 16.4 km/l) |
| Fuel consumption (extra urban) | 4.4 l/100 km (53.5 US mpg, 64.2 UK mpg, 22.7 km/l) |
| Fuel consumption (combined) | 5 l/100 km (47 US mpg, 56.5 UK mpg, 20 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 13.9 sec |
| Acceleration 0 – 62 mph | 13.9 sec |
| Acceleration 0 – 60 mph | 13.2 sec |
| Maximum speed | 160 km/h (99.42 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 12.7 kg/Hp, 78.7 Hp/tonne |
| Weight-to-torque ratio | 9.5 kg/Nm, 105.6 Nm/tonne |
| Power | 70 Hp @ 6000 rpm |
| Power per litre | 70.1 Hp/l |
| Torque | 94 Nm @ 3600 rpm (69.33 lb.-ft. @ 3600 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | 1KR-FE |
| Engine displacement | 998 cm3 (60.9 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 71 mm (2.8 in.) |
| Piston Stroke | 84 mm (3.31 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 3.6 l (3.8 US qt | 3.17 UK qt) |
| Coolant | 3.3 l (3.49 US qt | 2.9 UK qt) |
| Kerb Weight | 890 kg (1962.11 lbs.) |
| Max. weight | 1390 kg (3064.43 lbs.) |
| Max load | 500 kg (1102.31 lbs.) |
| Trunk (boot) space – minimum | 225 l (7.95 cu. ft.) |
| Trunk (boot) space – maximum | 630 l (22.25 cu. ft.) |
| Fuel tank capacity | 40 l (10.57 US gal | 8.8 UK gal) |
| Length | 3610 mm (142.13 in.) |
| Width | 1665 mm (65.55 in.) |
| Height | 1540 mm (60.63 in.) |
| Wheelbase | 2430 mm (95.67 in.) |
| Front track | 1470 mm (57.87 in.) |
| Rear (Back) track | 1475 mm (58.07 in.) |
| Minimum turning circle | 8.6 m (28.22 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 5 gears, manual transmission |
| Front suspension | Spring Strut |
| Rear suspension | Independent coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 155/80 R13; 175/65 R14 |
| Wheel rims size | 4.5B x 13 ET35; 5J x 14 ET40 |
INTRODUCTION
The Subaru Justy IV 1.0i (70 hp) represents a significant shift in Subaru’s approach to the subcompact market. Produced between 2007 and 2011, this generation of the Justy was essentially a rebadged version of the Daihatsu Sirion/Boon, a result of Subaru’s partnership with Daihatsu Motor Co. This collaboration allowed Subaru to offer a competitively priced, fuel-efficient vehicle without the substantial development costs. The 1.0i variant served as the entry point to the Justy IV range, targeting buyers prioritizing economy and practicality over outright performance. It was primarily sold in Europe and parts of Asia.
Powertrain & Engine Architecture
At the heart of the Justy IV 1.0i lies the 1KR-FE engine, a 998cc inline-three cylinder petrol engine developed by Daihatsu. This engine utilizes a single overhead camshaft (SOHC) design with four valves per cylinder (DOHC). Fuel delivery is managed by a multi-point fuel injection system. The 1KR-FE is known for its lightweight construction and relatively simple design, contributing to its fuel efficiency. The engine produces 70 horsepower at 6000 rpm and 94 Nm (69.33 lb-ft) of torque at 3600 rpm. The engine is transversely mounted in the front of the vehicle. Paired with the 1.0i engine is a five-speed manual transmission, chosen for its affordability and efficiency. This transmission features standard gear ratios optimized for fuel economy rather than rapid acceleration.
Driving Characteristics
The driving experience in the Justy IV 1.0i is characterized by its focus on practicality and fuel economy. Acceleration is modest, taking approximately 13.9 seconds to reach 62 mph (100 km/h). The 1.0-liter engine feels strained when pushed hard, particularly when fully loaded or climbing hills. The five-speed manual transmission allows for reasonable control, but the gear ratios are spaced to prioritize fuel efficiency over spirited driving. Compared to potential higher-output variants (which weren’t widely available in most markets), the 1.0i feels noticeably slower. However, its light weight and nimble handling make it easy to maneuver in urban environments. The steering is light and responsive, and the suspension provides a comfortable, if somewhat basic, ride.
Equipment & Trim Levels
The Justy IV 1.0i, as the base trim level, came equipped with a relatively basic set of features. Standard equipment typically included power steering, central locking, electric front windows, and a basic audio system. Safety features included dual front airbags and ABS (Anti-lock Braking System). Interior upholstery was typically a simple cloth material. Optional extras, depending on the market, could include air conditioning, alloy wheels, and a more advanced audio system. The dashboard layout was functional and straightforward, prioritizing ease of use over aesthetic appeal.
Chassis & Braking
The Justy IV 1.0i utilizes a front-wheel-drive layout with a MacPherson strut suspension in the front and an independent coil spring suspension in the rear. The suspension setup is tuned for comfort and ride quality rather than sporty handling. Braking duties are handled by disc brakes on all four wheels, providing adequate stopping power for the vehicle’s weight and performance. The ABS system helps to maintain steering control during emergency braking situations. The relatively light curb weight of around 890 kg (1962 lbs) contributes to the car’s agility and helps to offset the modest engine output.
Market Reception & Comparison
The Subaru Justy IV 1.0i was generally well-received as an affordable and economical city car. Critics praised its fuel efficiency and ease of driving, but noted its lack of performance and somewhat basic interior. Compared to other subcompacts available at the time, such as the Toyota Yaris or the Volkswagen Polo, the Justy IV 1.0i offered a competitive price point but lacked the refinement and driving dynamics of its rivals. Its fuel economy, averaging around 5 liters per 100 km (47 US mpg), was a key selling point. Reliability was generally considered good, benefiting from the proven Daihatsu engine and transmission.
Legacy
The Subaru Justy IV 1.0i, while not a performance icon, remains a practical and affordable option in the used car market. The 1KR-FE engine is known for its durability and relatively low maintenance costs. Common issues are typically limited to routine wear and tear items. The simplicity of the vehicle’s design makes it relatively easy and inexpensive to repair. Today, the Justy IV 1.0i is often sought after by first-time car buyers or those looking for a reliable and economical city runabout. Its fuel efficiency and compact size continue to make it a viable option for urban commuting.
