The Opel Astra K 1.4 EcoTec (125 hp) ecoFLEX start&stop represents a significant iteration within the Astra K generation, produced from 2015 to 2018. Positioned as a fuel-efficient and accessible option within the Astra K lineup, this variant aimed to balance practicality with reasonable performance. It was a key model for Opel in the European market, competing directly with vehicles like the Volkswagen Golf, Ford Focus, and Peugeot 308. The Astra K, overall, represented a move towards lighter construction and more efficient powertrains for Opel, and this 1.4L EcoTec engine played a crucial role in achieving those goals.
Technical Specifications
| Brand | Opel |
| Model | Astra |
| Generation | Astra K |
| Type (Engine) | 1.4 EcoTec (125 Hp) ecoFLEX start&stop |
| Start of production | 2015 year |
| End of production | 2018 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.2 – 6.3 l/100 km (37.9 – 37.3 US mpg, 45.6 – 44.8 UK mpg, 16.1 – 15.9 km/l) |
| Fuel consumption (extra urban) | 4.2 – 4.3 l/100 km (56 – 54.7 US mpg, 67.3 – 65.7 UK mpg, 23.8 – 23.3 km/l) |
| Fuel consumption (combined) | 4.9 – 5.1 l/100 km (48 – 46.1 US mpg, 57.6 – 55.4 UK mpg, 20.4 – 19.6 km/l) |
| CO2 emissions | 117 – 114 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.5 sec |
| Acceleration 0 – 62 mph | 9.5 sec |
| Acceleration 0 – 60 mph | 9 sec (Calculated) |
| Maximum speed | 205 km/h (127.38 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 9.6 kg/Hp, 103.9 Hp/tonne |
| Weight-to-torque ratio | 5.2 kg/Nm, 191.2 Nm/tonne |
| Power | 125 Hp @ 4000-5600 rpm |
| Power per litre | 89.3 Hp/l |
| Torque | 230 Nm @ 2000-3500 rpm (169.64 lb.-ft. @ 2000-3500 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B14XFL |
| Engine displacement | 1399 cm3 (85.37 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 74 mm (2.91 in.) |
| Piston Stroke | 81.3 mm (3.2 in.) |
| Compression ratio | 10:1 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant capacity | 5.1 l (5.39 US qt | 4.49 UK qt) |
| Kerb Weight | 1203 kg (2652.16 lbs.) |
| Max. weight | 1815 kg (4001.39 lbs.) |
| Max load | 612 kg (1349.23 lbs.) |
| Trunk (boot) space – minimum | 370 l (13.07 cu. ft.) |
| Trunk (boot) space – maximum | 1210 l (42.73 cu. ft.) |
| Fuel tank capacity | 48 l (12.68 US gal | 10.56 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1450 kg (3196.7 lbs.) |
| Permitted trailer load without brakes | 620 kg (1366.87 lbs.) |
| Length | 4370 mm (172.05 in.) |
| Width | 1809 mm (71.22 in.) |
| Width with mirrors folded | 1871 mm (73.66 in.) |
| Width including mirrors | 2042 mm (80.39 in.) |
| Height | 1485 mm (58.46 in.) |
| Wheelbase | 2662 mm (104.8 in.) |
| Front track | 1544 mm (60.79 in.) |
| Rear track | 1558 mm (61.34 in.) |
| Minimum turning circle | 11.05 m (36.25 ft.) |
| Drivetrain | Front wheel drive |
| Number of gears & type | 6 gears, manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Tires size | 195/65 R15; 205/55 R16 |
| Wheel rims size | 6J x 15; 6.5J x 16 |
Powertrain & Engine Architecture
At the heart of the Astra K 1.4 EcoTec lies the B14XFL engine, a 1.4-liter turbocharged inline-four cylinder gasoline engine. This engine is a member of Opel’s ‘Small Diesel/Gasoline’ (SDG) family, designed for modularity and efficiency. The B14XFL utilizes direct fuel injection, a technology that precisely meters fuel directly into the combustion chamber, improving combustion efficiency and reducing emissions. The engine also features an intercooler, which cools the intake air, increasing its density and further enhancing performance. The turbocharger provides a boost in power, compensating for the relatively small displacement. The engine’s start&stop system automatically shuts off the engine when the vehicle is stationary (at traffic lights, for example) to conserve fuel. The 6-speed manual transmission was the standard offering, providing a balance between fuel economy and driver engagement.
Driving Characteristics
The 125 hp output, coupled with 230 Nm (169.64 lb-ft) of torque, provided adequate performance for everyday driving. Acceleration from 0-60 mph took around 9 seconds, making it competitive within its class. However, it wasn’t designed for outright speed. The engine’s torque curve was relatively flat, providing usable power across a wide rev range, making it easy to drive in urban environments. Compared to the more powerful 1.6-liter turbo or diesel variants, the 1.4 EcoTec felt less responsive, particularly during overtaking maneuvers. The manual transmission offered precise shifts, but the gear ratios were tuned for fuel efficiency rather than sporty acceleration. The overall driving experience was comfortable and refined, prioritizing fuel economy and ease of use over dynamic handling.
Equipment & Trim Levels
The Astra K 1.4 EcoTec (125 hp) ecoFLEX start&stop typically came equipped with a reasonable level of standard features. These included air conditioning, power windows, a basic audio system with USB connectivity, and stability control. Higher trim levels, such as ‘Enjoy’ or ‘Edition’, added features like alloy wheels, a touchscreen infotainment system, cruise control, and parking sensors. Interior upholstery was typically cloth, with options for upgraded materials on higher trims. Optional extras included a panoramic sunroof, heated seats, and advanced driver-assistance systems like lane departure warning and automatic emergency braking.
Chassis & Braking
The Astra K utilized a MacPherson strut front suspension and a torsion beam rear suspension. This setup provided a good balance between ride comfort and handling. The torsion beam rear suspension was a cost-effective solution, but it didn’t offer the same level of sophistication as a multi-link setup found on some higher-end trims. Braking consisted of ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) was standard, providing enhanced braking performance and stability. The steering was electrically assisted, offering light and precise control.
Market Reception & Comparison
The Astra K 1.4 EcoTec (125 hp) ecoFLEX start&stop was generally well-received by critics as a practical and fuel-efficient option. Its fuel economy figures of around 4.9-5.1 l/100 km (48-46.1 US mpg) were competitive within its segment. However, some reviewers noted that the engine could feel underpowered, particularly when fully loaded or driving uphill. Compared to the 1.6-liter turbo variant, the 1.4 EcoTec offered lower running costs but sacrificed some performance. The diesel variants provided even better fuel economy but came with a higher purchase price and potential maintenance costs associated with diesel particulate filters.
Legacy
The B14XFL engine, while not known for being exceptionally robust, has proven to be reasonably reliable in the Astra K. Common issues include occasional turbocharger problems and potential issues with the direct injection system. However, with regular maintenance, these engines can provide many years of service. On the used car market, the Astra K 1.4 EcoTec (125 hp) ecoFLEX start&stop represents a good value proposition for buyers seeking a fuel-efficient and affordable hatchback. Its relatively low running costs and comfortable driving experience make it a popular choice for commuters and small families.
