The Opel Astra J 1.4 Turbo (140 hp) ecoFLEX LPG, produced between 2009 and 2012, represented a significant offering within the broader Astra J range (2009-2015). Positioned as a fuel-efficient and environmentally conscious option, this variant combined a turbocharged petrol engine with the flexibility of LPG (Liquefied Petroleum Gas) conversion. It was a key model for Opel in the European market, appealing to buyers seeking lower running costs and reduced emissions without sacrificing everyday usability. The Astra J itself was built on the GM Delta II platform, shared with other vehicles like the Chevrolet Cruze, and aimed to improve upon its predecessor with enhanced refinement, technology, and safety features.
Technical Specifications
| Brand | Opel |
| Model | Astra |
| Generation | Astra J |
| Type (Engine) | 1.4 Turbo (140 Hp) ecoFLEX LPG |
| Start of production | 2009 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 7.9-10.6 l/100 km (29.8 – 22.2 US mpg, 35.8 – 26.6 UK mpg, 12.7 – 9.4 km/l) |
| Fuel consumption (extra urban) | 4.9-6.4 l/100 km (48 – 36.8 US mpg, 57.6 – 44.1 UK mpg, 20.4 – 15.6 km/l) |
| Fuel consumption (combined) | 6.0-7.9 l/100 km (39.2 – 29.8 US mpg, 47.1 – 35.8 UK mpg, 16.7 – 12.7 km/l) |
| CO2 emissions | 129-141 g/km |
| Fuel Type | Petrol / LPG |
| Acceleration 0 – 100 km/h | 10.8 sec |
| Acceleration 0 – 62 mph | 10.8 sec |
| Acceleration 0 – 60 mph | 10.3 sec |
| Maximum speed | 200 km/h (124.27 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.3 kg/Hp, 107.9 Hp/tonne |
| Weight-to-torque ratio | 6.5 kg/Nm, 154.1 Nm/tonne |
| Power | 140 Hp @ 4900-6000 rpm |
| Power per litre | 102.6 Hp/l |
| Torque | 200 Nm @ 1850-4900 rpm (147.51 lb.-ft. @ 1850-4900 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | A14NET |
| Engine displacement | 1364 cm3 (83.24 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 72.5 mm (2.85 in.) |
| Piston Stroke | 82.6 mm (3.25 in.) |
| Compression ratio | 9.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant | 6.2 l (6.55 US qt | 5.46 UK qt) |
| Kerb Weight | 1298 kg (2861.6 lbs.) |
| Max. weight | 1870 kg (4122.64 lbs.) |
| Max load | 572 kg (1261.04 lbs.) |
| Length | 4419 mm (173.98 in.) |
| Width | 1814 mm (71.42 in.) |
| Width including mirrors | 2013 mm (79.25 in.) |
| Height | 1510 mm (59.45 in.) |
| Wheelbase | 2685 mm (105.71 in.) |
| Front track | 1541 mm (60.67 in.) |
| Rear track | 1551 mm (61.06 in.) |
| Ride height (ground clearance) | 160 mm (6.3 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle | 11.4 m (37.4 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 | 6 gears, manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 215/50 R17 |
| Wheel rims size | 17 |
INTRODUCTION
The Opel Astra J 1.4 Turbo ecoFLEX LPG, launched in 2009, was a key variant in Opel’s strategy to offer fuel-efficient and alternative-fuel vehicles. It built upon the foundation of the Astra J hatchback, a model designed to compete in the highly competitive C-segment (compact family car) market. The ecoFLEX designation signified Opel’s commitment to reducing emissions and improving fuel economy through various engineering enhancements. The addition of LPG capability broadened its appeal, particularly in countries with established LPG infrastructure and incentives. This model aimed to provide a balance between performance, economy, and environmental responsibility.
Powertrain & Engine Architecture
At the heart of the Astra J 1.4 Turbo ecoFLEX LPG lies the A14NET engine, a 1.4-liter inline-four cylinder petrol engine equipped with a turbocharger and multi-point fuel injection. This engine produced 140 horsepower at 4900-6000 rpm and 200 Nm (147.51 lb-ft) of torque between 1850 and 4900 rpm. The turbocharger, a key component, provided increased power output from a relatively small displacement engine. The LPG conversion was typically a factory-installed option, utilizing a dedicated LPG tank and fuel system integrated with the petrol system, allowing seamless switching between fuels. The engine featured a timing chain, contributing to reduced maintenance compared to timing belts. The six-speed manual transmission was standard, offering a good balance between fuel efficiency and driver engagement. The engine’s design prioritized efficiency, with features like low-friction components and optimized combustion chamber geometry.
Driving Characteristics
The 1.4 Turbo ecoFLEX LPG offered a reasonably responsive driving experience, particularly when running on petrol. The turbocharger provided a noticeable boost in power during acceleration, making it suitable for both urban and highway driving. However, performance was noticeably diminished when operating on LPG, with a slight reduction in power and torque. The six-speed manual transmission allowed for precise gear selection and helped to maintain optimal engine speed for efficiency. Compared to higher-output Astra J variants, such as those with the 1.6-liter turbo or diesel engines, the 1.4 Turbo felt less powerful, especially when fully loaded. The suspension was tuned for comfort, providing a relatively smooth ride, but it wasn’t particularly sporty. The steering was light and precise, making it easy to maneuver in tight spaces.
Equipment & Trim Levels
The Astra J 1.4 Turbo ecoFLEX LPG was typically offered in mid-range trim levels, such as ‘Enjoy’ or ‘Edition’ in many European markets. Standard equipment generally included air conditioning, electric front windows, a CD/MP3 stereo system, and ABS brakes. Higher trim levels added features like alloy wheels, cruise control, a multi-function steering wheel, and upgraded interior trim. Optional extras included a panoramic sunroof, parking sensors, and a navigation system. Interior upholstery was typically cloth, with the option of leather upgrades on higher trims. The dashboard layout was modern and functional, with a clear instrument cluster and intuitive controls.
Chassis & Braking
The Astra J utilized a MacPherson strut front suspension and a torsion beam rear suspension. This configuration provided a good balance between ride comfort and handling. The front brakes were ventilated discs, while the rear brakes were solid discs. ABS (Anti-lock Braking System) was standard, enhancing safety during emergency braking. The steering system employed a rack and pinion setup, providing precise and responsive steering feel. The chassis was designed to be lightweight, contributing to improved fuel efficiency and handling. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The Astra J 1.4 Turbo ecoFLEX LPG was generally well-received by critics for its fuel efficiency and reduced emissions. It was seen as a practical and economical choice for drivers who covered high mileages. Compared to the petrol-only 1.4 Turbo, the LPG variant offered lower running costs, particularly in countries with favorable LPG pricing. However, some reviewers noted the slight performance reduction when running on LPG. Compared to the diesel-powered Astra J models, the 1.4 Turbo LPG offered a quieter and smoother driving experience, but lacked the diesel’s superior fuel economy and torque. The LPG conversion added to the initial purchase price, but the long-term savings on fuel costs often offset this difference.
Legacy
The Opel Astra J 1.4 Turbo ecoFLEX LPG remains a relatively common sight on European roads today. The A14NET engine, while not without its quirks, has proven to be reasonably reliable, particularly when properly maintained. The LPG conversion system, if well-maintained, can provide many years of trouble-free operation. In the used car market, these models are often sought after by buyers looking for an economical and environmentally friendly vehicle. However, potential buyers should be aware of the need for regular LPG system servicing and the availability of LPG refueling stations in their area. The Astra J 1.4 Turbo ecoFLEX LPG represents a significant step in Opel’s efforts to offer alternative-fuel vehicles and reduce the environmental impact of its products.
