The Chevrolet Onix II Plus 1.2 (90 hp) is a subcompact sedan produced by Chevrolet from 2019 to 2025. Positioned as an entry-level offering within the broader Onix II Plus range, it represented a significant step forward for Chevrolet in the South American market, particularly in Brazil where it was primarily sold. The Onix II Plus, built on the GM GEM platform, aimed to provide a modern, fuel-efficient, and affordable option for consumers. This 1.2-liter variant served as the gateway to the Onix II Plus lineup, appealing to buyers prioritizing economy and practicality. It was a key competitor against models like the Fiat Argo and Volkswagen Polo in the highly competitive Brazilian automotive landscape.
Technical Specifications
| Brand | Chevrolet |
| Model | Onix |
| Generation | Onix II Plus |
| Type (Engine) | 1.2 (90 Hp) |
| Start of production | 2019 |
| End of production | 2025 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 11.6 kg/Hp, 86 Hp/tonne |
| Weight-to-torque ratio | 9.1 kg/Nm, 109.9 Nm/tonne |
| Power | 90 Hp @ 6200 rpm |
| Power per litre | 75.1 Hp/l |
| Torque | 115 Nm @ 4400 rpm, 84.82 lb.-ft. @ 4400 rpm |
| Maximum engine speed | 6500 rpm |
| Engine layout | Front, Transverse |
| Engine displacement | 1199 cm3, 73.17 cu. in. |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 75 mm, 2.95 in. |
| Piston Stroke | 90.5 mm, 3.56 in. |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 3.75 l, 3.96 US qt | 3.3 UK qt |
| Coolant | 5.4 l, 5.71 US qt | 4.75 UK qt |
| Kerb Weight | 1046-1055 kg, 2306.04 – 2325.88 lbs. |
| Max. weight | 1465 kg, 3229.77 lbs. |
| Max load | 410-419 kg, 903.9 – 923.74 lbs. |
| Trunk (boot) space – minimum | 500 l, 17.66 cu. ft. |
| Fuel tank capacity | 44 l, 11.62 US gal | 9.68 UK gal |
| Length | 4474 mm, 176.14 in. |
| Width | 1730 mm, 68.11 in. |
| Width including mirrors | 2044 mm, 80.47 in. |
| Height | 1474 mm, 58.03 in. |
| Wheelbase | 2600 mm, 102.36 in. |
| Front track | 1506 mm, 59.29 in. |
| Rear (Back) track | 1510 mm, 59.45 in. |
| Front overhang | 882 mm, 34.72 in. |
| Rear overhang | 992 mm, 39.06 in. |
| Ride height (ground clearance) | 127 mm, 5 in. |
| Minimum turning circle (turning diameter) | 10.6 m, 34.78 ft. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Torsion |
| Front brakes | Disc |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 185/70 R14; 185/65 R15 |
| Wheel rims size | 5.5J x 14; 6J x 15 |
Powertrain & Engine Architecture
The Chevrolet Onix II Plus 1.2 (90 hp) is powered by the GM Family 0 1.2-liter inline-three cylinder engine. This engine, designated as a member of the X12 family, is a naturally aspirated unit featuring multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain. The engine’s compact size and lightweight construction contribute to the Onix’s overall efficiency. The 1.2L engine utilizes a timing chain, reducing maintenance compared to timing belts. The engine’s 10.5:1 compression ratio is a balance between efficiency and performance. The 5-speed manual transmission was the standard offering for this variant, chosen for its simplicity and cost-effectiveness. The transmission’s gear ratios are tuned for fuel economy and acceptable acceleration in urban driving conditions.
Driving Characteristics
The 90 hp output of the 1.2-liter engine translates to modest, but adequate, performance for everyday driving. Acceleration is not brisk, with a 0-60 mph time estimated around 12-13 seconds. The engine feels most comfortable in the lower to mid-range of the rev band, providing sufficient torque for city driving and highway merging. The 5-speed manual transmission allows drivers to keep the engine in its optimal power range. Compared to the more powerful 1.0 Turbo version of the Onix II Plus, the 1.2L feels noticeably less responsive, particularly when fully loaded or climbing hills. However, the 1.2L offers a smoother and more linear power delivery, which some drivers may prefer. The relatively light weight of the Onix II Plus helps to mitigate the engine’s power deficit.
Equipment & Trim Levels
The 1.2-liter Onix II Plus typically served as the base trim level, offering a functional and affordable package. Standard equipment generally included air conditioning, power steering, electric front windows, central locking, and an audio system with Bluetooth connectivity. Safety features included dual front airbags and ABS brakes. Higher trim levels, such as the LT and Premier, added features like alloy wheels, a touchscreen infotainment system, rear parking sensors, and automatic headlights. Interior upholstery was typically cloth, with a simple and durable design. Optional extras included a rearview camera and a more advanced audio system.
Chassis & Braking
The Onix II Plus utilizes a McPherson strut front suspension and a torsion beam rear suspension. This setup provides a comfortable ride quality, well-suited for the often-rough road conditions found in Brazil. The front brakes are disc brakes, while the rear brakes are drum brakes – a cost-saving measure common in entry-level vehicles. ABS (Anti-lock Braking System) is standard, enhancing braking performance and safety. The steering is a rack and pinion system, providing precise and responsive handling. Stabilizer bars are included on both axles to reduce body roll during cornering.
Market Reception & Comparison
The Chevrolet Onix II Plus 1.2 (90 hp) was generally well-received by Brazilian consumers as an affordable and practical option. Critics praised its fuel efficiency and comfortable ride, but noted its lack of outright performance. Compared to the 1.0 Turbo version, the 1.2L offered lower running costs but less excitement. The 1.2L variant was often seen as a sensible choice for first-time car buyers or those prioritizing economy over performance. Fuel economy figures typically ranged from 35-40 mpg in combined driving conditions. Reliability was generally good, with the 1.2L engine proving to be durable and relatively maintenance-free.
Legacy
The Chevrolet Onix II Plus, including the 1.2L variant, quickly became one of the best-selling cars in Brazil, dominating the subcompact sedan segment for several years. The 1.2L engine, while not the most powerful option, proved to be a reliable and fuel-efficient choice for many drivers. In the used car market, the Onix II Plus 1.2 (90 hp) remains a popular choice due to its affordability and low running costs. Its simple mechanical design and readily available parts contribute to its continued appeal. While newer models have since been introduced, the Onix II Plus 1.2 holds a significant place in the history of Chevrolet in South America.
