The Opel Astra K 1.6 CDTi (160 hp) ecoFLEX start&stop, produced from 2015 to 2018, represented a significant offering within the Astra K generation (2015-2019). Positioned as a mid-range trim, it aimed to balance fuel efficiency with respectable performance, appealing to drivers seeking a practical and economical hatchback. This variant was a key component of Opel’s strategy to offer a diverse range of powertrains within the K series, leveraging the benefits of diesel technology and advanced engine management systems. The Astra K itself was a pivotal model for Opel, representing a move towards lighter construction and more sophisticated technology compared to its predecessor.
Technical Specifications
| Brand | Opel |
| Model | Astra |
| Generation | Astra K |
| Type (Engine) | 1.6 CDTi (160 Hp) ecoFLEX start&stop |
| Start of production | 2015 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.1 – 5.2 l/100 km (46.1 – 45.2 US mpg) |
| Fuel consumption (extra urban) | 3.5 – 3.6 l/100 km (67.2 – 65.3 US mpg) |
| Fuel consumption (combined) | 4.1 – 4.2 l/100 km (57.4 – 56 US mpg) |
| CO2 emissions | 111 – 108 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.6 sec |
| Acceleration 0 – 62 mph | 8.6 sec |
| Acceleration 0 – 60 mph | 8.2 sec |
| Maximum speed | 220 km/h (136.7 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8 kg/Hp |
| Weight-to-torque ratio | 3.6 kg/Nm |
| Power | 160 Hp @ 4000 rpm |
| Torque | 350 Nm @ 1500-2250 rpm (258.15 lb.-ft. @ 1500-2250 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B16DTR |
| Engine displacement | 1598 cm3 (97.52 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 79.7 mm (3.14 in.) |
| Piston Stroke | 80.1 mm (3.15 in.) |
| Compression ratio | 16:1 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Kerb Weight | 1275 kg (2810.89 lbs.) |
| Max. weight | 1875 kg (4133.67 lbs.) |
| Max load | 600 kg (1322.77 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%) | 1550 kg (3417.17 lbs.) |
| Permitted trailer load without brakes | 680 kg (1499.14 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 | 1548 mm (60.94 in.) |
| Rear (Back) track | 1565 mm (61.61 in.) |
| Minimum turning circle | 11.05 m (36.25 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears and type of gearbox | 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
The heart of the Astra K 1.6 CDTi ecoFLEX was the B16DTR engine, a 1.6-liter inline-four cylinder diesel. This engine was a member of Opel/Vauxhall’s ‘Whisper Diesel’ family, known for its quiet operation and efficiency. The B16DTR featured a sophisticated bi-turbocharger setup – a small turbo for quick response at low RPM and a larger turbo for sustained power at higher speeds. This configuration, combined with an intercooler, allowed the engine to produce 160 horsepower at 4000 rpm and a substantial 350 Nm (258 lb-ft) of torque between 1500 and 2250 rpm. The engine utilized a common-rail direct fuel injection system, delivering fuel at extremely high pressure for optimized combustion. A 16:1 compression ratio further contributed to the engine’s efficiency. The 6-speed manual transmission was the standard offering, chosen for its balance of fuel economy and driver engagement.
Driving Characteristics
The 1.6 CDTi 160 hp variant offered a surprisingly sprightly driving experience for a diesel hatchback. While not a performance-oriented model, the ample torque available from low RPM provided strong acceleration in everyday driving situations. The 0-60 mph time of around 8.2 seconds was respectable for the class. The manual transmission allowed for precise control, and the gear ratios were well-matched to the engine’s powerband. Compared to the base 1.0-liter turbocharged petrol engine, the 1.6 CDTi offered significantly more torque and a more relaxed cruising experience. However, it lacked the outright responsiveness of the petrol engine. Against higher-output diesel variants, such as those with 170 hp, the 160 hp version felt slightly less potent, particularly during overtaking maneuvers.
Equipment & Trim Levels
The Astra K 1.6 CDTi ecoFLEX typically came equipped with a solid range of standard features. These included air conditioning, a touchscreen infotainment system with Bluetooth connectivity, alloy wheels, and a suite of safety features such as ABS, ESP (Electronic Stability Program), and multiple airbags. Higher trim levels offered upgrades like heated seats, a larger touchscreen display, navigation system, and advanced driver-assistance systems like lane departure warning and automatic emergency braking. Interior upholstery was typically cloth, with options for leather upgrades. The ecoFLEX designation indicated the inclusion of fuel-saving technologies like start&stop functionality and optimized aerodynamics.
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 1.6 CDTi variant, being a mid-range model, typically featured ventilated front disc brakes and solid rear disc brakes. The braking system was generally considered adequate for the vehicle’s performance, providing confident stopping power. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The Astra K 1.6 CDTi ecoFLEX was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined engine. However, some reviewers noted that the interior design, while modern, lacked the premium feel of some competitors. Compared to other diesel hatchbacks in its class, such as the Volkswagen Golf and Ford Focus, the Astra K offered a competitive combination of price, fuel economy, and features. The 1.6 CDTi proved to be a popular choice for drivers covering high mileage, thanks to its excellent fuel consumption and relatively low running costs.
Legacy
The B16DTR engine, while generally reliable, has been known to exhibit issues with the diesel particulate filter (DPF) if not properly maintained, particularly with frequent short journeys. Regular servicing and the use of high-quality diesel fuel are crucial for ensuring the longevity of this powertrain. On the used car market, the Astra K 1.6 CDTi ecoFLEX remains a popular choice, offering a good balance of practicality, economy, and reliability. Its reputation for fuel efficiency and relatively low maintenance costs continues to attract buyers seeking a sensible and affordable hatchback.
