The Opel Astra H GTC (facelift, introduced in 2007) 1.9 CDTI ECOTEC with 120 horsepower and an automatic transmission represents a specific configuration within the broader Astra H GTC range, produced from 2007 to 2010. Positioned as a mid-range offering, this variant aimed to balance fuel efficiency with acceptable performance for everyday driving. The Astra H GTC, a three-door coupe version of the Astra H, was Opel’s entry into the compact sports hatchback segment, primarily targeted at the European market. This particular diesel-powered automatic model offered a more relaxed driving experience compared to its manual counterparts and higher-performance trims.
Technical Specifications
| Brand | Opel |
| Model | Astra |
| Generation | Astra H GTC (facelift 2007) |
| Type (Engine) | 1.9 CDTI ECOTEC (120 Hp) Automatic |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 3 |
| Fuel consumption (urban) | 9.6 l/100 km (24.5 US mpg, 29.4 UK mpg, 10.4 km/l) |
| Fuel consumption (extra urban) | 5.3 l/100 km (44.4 US mpg, 53.3 UK mpg, 18.9 km/l) |
| Fuel consumption (combined) | 6.9 l/100 km (34.1 US mpg, 40.9 UK mpg, 14.5 km/l) |
| CO2 emissions | 186 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.4 sec |
| Acceleration 0 – 62 mph | 11.4 sec |
| Acceleration 0 – 60 mph | 10.8 sec |
| Maximum speed | 190 km/h (118.06 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 11.1 kg/Hp |
| Weight-to-torque ratio | 4.8 kg/Nm |
| Power | 120 Hp @ 3500 rpm |
| Torque | 280 Nm @ 2000-2750 rpm (206.52 lb.-ft. @ 2000-2750 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Z19DT |
| Engine displacement | 1910 cm3 (116.56 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 90.4 mm (3.56 in.) |
| Compression ratio | 18:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | SOHC |
| Engine oil capacity | 4.3 l (4.54 US qt | 3.78 UK qt) |
| Coolant capacity | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1333 kg (2938.76 lbs.) |
| Max. weight | 1895 kg (4177.76 lbs.) |
| Max load | 562 kg (1239 lbs.) |
| Trunk (boot) space – minimum | 340 l (12.01 cu. ft.) |
| Trunk (boot) space – maximum | 1070 l (37.79 cu. ft.) |
| Fuel tank capacity | 52 l (13.74 US gal | 11.44 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load (braked) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load (unbraked) | 680 kg (1499.14 lbs.) |
| Length | 4290 mm (168.9 in.) |
| Width | 1753 mm (69.02 in.) |
| Width with mirrors folded | 1804 mm (71.02 in.) |
| Width including mirrors | 2033 mm (80.04 in.) |
| Height | 1435 mm (56.5 in.) |
| Wheelbase | 2614 mm (102.91 in.) |
| Front track | 1488 mm (58.58 in.) |
| Rear track | 1488 mm (58.58 in.) |
| Front overhang | 910 mm (35.83 in.) |
| Rear overhang | 766 mm (30.16 in.) |
| Minimum turning circle | 11.2 m (36.75 ft.) |
| Drivetrain | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Torsion |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
| Tires size | 205/55 R16; 225/45 R17; 225/40 R18 |
| Wheel rims size | 6.5J x 16; 7J x 17; 7.5J x 18 |
Powertrain & Engine Architecture
The heart of this Astra GTC is the Z19DT, a 1.9-liter inline-four cylinder diesel engine. This engine, part of Opel/Fiat’s ECOTEC family, utilizes a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The Z19DT features a single overhead camshaft (SOHC) valvetrain operating two valves per cylinder. A turbocharger with an intercooler is employed to increase power output and improve torque across a wider rev range. The automatic transmission is a six-speed unit, designed to provide smooth gear changes and enhance driving comfort. This transmission, while offering convenience, typically resulted in slightly lower fuel economy compared to the manual transmission options.
Driving Characteristics
The 120 hp output, coupled with the automatic transmission, provided a comfortable and predictable driving experience. Acceleration from 0-60 mph took approximately 10.8 seconds, which was adequate for everyday driving but noticeably slower than the more powerful Astra GTC variants, such as those equipped with the 1.9 CDTI engine tuned to 150 hp or the petrol-powered 2.0 Turbo. The automatic transmission’s gear ratios were optimized for fuel efficiency rather than outright performance. While the engine delivered a respectable 280 Nm (206.52 lb.-ft.) of torque, the automatic transmission could sometimes feel hesitant during quick overtaking maneuvers. The focus was on providing a relaxed and refined driving experience, making it well-suited for long journeys and urban commuting.
Equipment & Trim Levels
The 1.9 CDTI ECOTEC 120 hp Automatic typically came with a reasonable level of standard equipment. This included air conditioning, power windows, central locking, and an audio system with CD player. Higher trim levels offered options such as alloy wheels, sport seats, a multi-function steering wheel, and parking sensors. Interior upholstery was generally cloth, with the option of leather upgrades. The dashboard layout was typical of the Astra H, featuring a straightforward design with easy-to-read instrumentation.
Chassis & Braking
The Astra H GTC utilized an independent McPherson strut suspension setup at the front, providing good handling and ride comfort. The rear suspension employed a torsion beam, a cost-effective solution that offered a reasonable balance between comfort and handling. Braking consisted of ventilated discs at the front and solid discs at the rear, equipped with an Anti-lock Braking System (ABS) as standard. The steering was rack and pinion with electric power assistance, offering a light and precise feel.
Market Reception & Comparison
The Astra H GTC 1.9 CDTI 120 hp Automatic was generally well-received by automotive critics as a practical and fuel-efficient option. However, it was often criticized for its relatively modest performance compared to other GTC variants. The 1.9 CDTI engine, while economical, wasn’t as refined as some of its competitors. Compared to the 1.9 CDTI 150 hp version, the 120 hp model offered significantly less power, resulting in slower acceleration and reduced overall driving enjoyment. However, the 120 hp version typically commanded a lower price and offered better fuel economy.
Legacy
The Z19DT engine, while generally reliable, is known to require regular maintenance, particularly regarding the diesel particulate filter (DPF). Proper servicing and the use of high-quality diesel fuel are crucial to prevent DPF blockages. The automatic transmission, if maintained correctly, is also relatively durable. Today, the Astra H GTC 1.9 CDTI Automatic can be found on the used car market at affordable prices. It represents a practical and economical choice for buyers seeking a comfortable and fuel-efficient hatchback, but potential buyers should be aware of the potential maintenance costs associated with the diesel particulate filter and ensure a thorough inspection before purchase.
