The Opel Astra H TwinTop 2.0i 16V Turbo ECOTEC, produced from May 2006 to June 2010, represents a compelling blend of open-air motoring and spirited performance within the Astra H range. This variant, a coupe-cabriolet, occupied a premium position in the TwinTop lineup, offering a more powerful engine option compared to the base models. It was primarily marketed in Europe, capitalizing on the popularity of retractable hardtop convertibles. The TwinTop utilized Opel’s HideTop retractable hardtop system, providing coupe-like security and weather protection when closed, and open-air enjoyment when retracted. This model is part of the Astra H generation (2004-2009), built on the GM Delta platform.
Technical Specifications
| Brand | Opel |
| Model | Astra |
| Generation | Astra H TwinTop |
| Type (Engine) | 2.0i 16V Turbo ECOTEC (200 Hp) |
| Start of production | May, 2006 |
| End of production | June, 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe – Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 13.3 l/100 km (17.7 US mpg, 21.2 UK mpg, 7.5 km/l) |
| Fuel consumption (extra urban) | 7.3 l/100 km (32.2 US mpg, 38.7 UK mpg, 13.7 km/l) |
| Fuel consumption (combined) | 9.5 l/100 km (24.8 US mpg, 29.7 UK mpg, 10.5 km/l) |
| CO2 emissions | 228 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.9 sec |
| Acceleration 0 – 62 mph | 8.9 sec |
| Acceleration 0 – 60 mph | 8.5 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.5 kg/Hp, 132.9 Hp/tonne |
| Weight-to-torque ratio | 5.7 kg/Nm, 174.1 Nm/tonne |
| Power | 200 Hp @ 5400 rpm |
| Power per litre | 100.1 Hp/l |
| Torque | 262 Nm @ 4200 rpm (193.24 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Z20LER |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 86 mm (3.39 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 8.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.3 l (4.54 US qt | 3.78 UK qt) |
| Coolant | 7.7 l (8.14 US qt | 6.78 UK qt) |
| Kerb Weight | 1505 kg (3317.96 lbs.) |
| Max. weight | 1975 kg (4354.13 lbs.) |
| Max load | 470 kg (1036.17 lbs.) |
| Trunk (boot) space – minimum | 205 l (7.24 cu. ft.) |
| Trunk (boot) space – maximum | 440 l (15.54 cu. ft.) |
| Fuel tank capacity | 52 l (13.74 US gal | 11.44 UK gal) |
| Length | 4476 mm (176.22 in.) |
| Width | 1759 mm (69.25 in.) |
| Width with mirrors folded | 1831 mm (72.09 in.) |
| Width including mirrors | 2021 mm (79.57 in.) |
| Height | 1411 mm (55.55 in.) |
| Wheelbase | 2614 mm (102.91 in.) |
| Front track | 1488 mm (58.58 in.) |
| Rear (Back) track | 1481 mm (58.31 in.) |
| Front overhang | 909 mm (35.79 in.) |
| Rear overhang | 953 mm (37.52 in.) |
| Ride height (ground clearance) | 122 mm (4.8 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle | 11.2 m (36.75 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 suspension | Coil spring |
| Rear suspension | Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/45 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
At the heart of the Astra H TwinTop 2.0i Turbo ECOTEC lies the Z20LER engine, a 1998cc inline-four cylinder powerplant. This engine is a member of Opel’s Ecotec family, known for its focus on efficiency and performance. The Z20LER utilizes a cast iron block with an aluminum cylinder head, featuring double overhead camshafts (DOHC) and four valves per cylinder. Fuel delivery is managed by a multi-port fuel injection system, and the engine benefits from a turbocharger with an intercooler, boosting power output to 200 horsepower at 5400 rpm and 262 Nm (193.24 lb-ft) of torque at 4200 rpm. The engine’s compression ratio is 8.8:1. The standard transmission for this variant was a six-speed manual gearbox, providing precise control and enhancing the driving experience. While an automatic transmission was offered in other Astra H models, it was not typically paired with the 2.0i Turbo engine in the TwinTop configuration.
Driving Characteristics
The 2.0i Turbo engine in the TwinTop delivers a noticeably more engaging driving experience compared to the lower-displacement engines available in the range. Acceleration from 0 to 100 km/h (0-62 mph) takes approximately 8.9 seconds, and the car reaches a top speed of 237 km/h (147.26 mph). The turbocharger provides a surge of power in the mid-range, making overtaking maneuvers effortless. The six-speed manual transmission allows drivers to keep the engine in its optimal power band. The added weight of the retractable hardtop roof, compared to a soft-top convertible, is noticeable, but the chassis is well-tuned to provide a stable and controlled ride. The TwinTop’s handling is generally considered competent, though not as sharp as that of the coupe version.
Equipment & Trim Levels
The Astra H TwinTop 2.0i Turbo ECOTEC typically came equipped with a generous level of standard features. These included air conditioning, power windows and mirrors, a CD stereo system, and alloy wheels. Higher trim levels added features such as leather upholstery, heated front seats, automatic climate control, and a premium sound system. The interior design was modern and functional, with a focus on ergonomics. Optional extras included parking sensors, a navigation system, and a panoramic sunroof (in addition to the retractable hardtop). Safety features included ABS, airbags, and traction control.
Chassis & Braking
The Astra H TwinTop utilizes a MacPherson strut front suspension and a torsion beam rear suspension. The front suspension incorporates coil springs and a stabilizer bar, while the rear suspension features a transverse stabilizer. Braking duties are handled by ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) is standard, providing enhanced stopping power and control. The steering system is a rack and pinion type, offering precise and responsive steering feel.
Market Reception & Comparison
The Astra H TwinTop 2.0i Turbo ECOTEC was generally well-received by automotive critics. It was praised for its stylish design, comfortable interior, and strong performance. However, some reviewers noted the added weight of the retractable hardtop and its impact on handling. Compared to the 1.8-liter versions, the 2.0i Turbo offered a significant performance upgrade, but at a higher price point. Fuel economy was reasonable for a turbocharged engine of this size, averaging around 9.5 l/100 km (24.8 US mpg). Reliability was generally good, although some owners reported minor issues with the retractable hardtop mechanism.
Legacy
The Opel Astra H TwinTop 2.0i Turbo ECOTEC remains a desirable used car, particularly for those seeking a stylish and well-equipped convertible. The Z20LER engine is known for its durability and relatively straightforward maintenance. However, potential buyers should be aware of the potential for issues with the retractable hardtop mechanism, which can be expensive to repair. The TwinTop represents a significant step forward in Opel’s convertible offerings, combining open-air enjoyment with a level of refinement and performance that was previously unavailable in this segment. Today, well-maintained examples are sought after by enthusiasts and collectors.
