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 respectable performance within the Astra H range. This variant, a coupe-cabriolet, occupied a mid-to-upper position in the TwinTop lineup, offering a turbocharged engine and a six-speed manual transmission as standard. It was primarily marketed in Europe as a stylish and relatively practical convertible, appealing to buyers seeking a more engaging driving experience than the base models offered. The TwinTop featured a fully automatic retractable hardtop, distinguishing it from soft-top convertibles and providing enhanced security and weather protection.
Technical Specifications
| Brand | Opel |
| Model | Astra |
| Generation | Astra H TwinTop |
| Type (Engine) | 2.0i 16V Turbo ECOTEC (170 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 l/100 km (18.1 US mpg, 21.7 UK mpg, 7.7 km/l) |
| Fuel consumption (extra urban) | 7 l/100 km (33.6 US mpg, 40.4 UK mpg, 14.3 km/l) |
| Fuel consumption (combined) | 9.2 l/100 km (25.6 US mpg, 30.7 UK mpg, 10.9 km/l) |
| CO2 emissions | 221 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 |
| Maximum speed | 224 km/h (139.19 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 8.9 kg/Hp, 113 Hp/tonne |
| Weight-to-torque ratio | 6 kg/Nm, 166.1 Nm/tonne |
| Power | 170 Hp @ 5200 rpm |
| Power per litre | 85.1 Hp/l |
| Torque | 250 Nm @ 1950 rpm (184.39 lb.-ft. @ 1950 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Z20LEL |
| 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 lies the Z20LEL engine, a 1.998-liter inline-four cylinder powerplant. This engine is a member of Opel’s Ecotec family, known for its focus on efficiency and refinement. The Z20LEL 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, ensuring precise fuel atomization. Crucially, the engine is turbocharged with an intercooler, boosting power output to 170 horsepower at 5200 rpm and 250 Nm (184 lb-ft) of torque at a relatively low 1950 rpm. This torque curve provides good responsiveness in everyday driving situations. The standard transmission for this variant was a Getrag M32 six-speed manual gearbox, known for its smooth shifts and durability. While an automatic transmission was available, the manual was favored by enthusiasts for its enhanced control and engagement.
Driving Characteristics
The 2.0i Turbo engine, coupled with the six-speed manual transmission, delivers a spirited driving experience. Acceleration from 0 to 62 mph (0-100 km/h) takes approximately 9.5 seconds, and the car reaches a top speed of 139 mph (224 km/h). The turbocharger provides a noticeable surge of power in the mid-range, making overtaking maneuvers relatively effortless. The manual gearbox allows for precise control over the engine’s power band, and the gear ratios are well-matched for both city driving and highway cruising. Compared to the naturally aspirated 1.8-liter versions, the 2.0i Turbo offers significantly more performance. It also feels more refined and less strained during acceleration. Compared to the diesel variants (like the 1.9 CDTI), the 2.0i Turbo provides a more linear power delivery and a more engaging engine note, but at the cost of fuel economy.
Equipment & Trim Levels
The Astra H TwinTop 2.0i Turbo 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, such as the Sport or Elegance, added features like leather upholstery, automatic climate control, rain-sensing wipers, and a more sophisticated audio system. Optional extras included a navigation system, heated seats, and parking sensors. The interior design was generally modern and functional, with a focus on ergonomics. The convertible top mechanism was fully automatic and could be operated at speeds up to 30 mph (50 km/h).
Chassis & Braking
The Astra H TwinTop utilized a MacPherson strut front suspension and a torsion beam rear suspension. The chassis was reinforced to compensate for the loss of structural rigidity inherent in a convertible design. Braking duties were handled by ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock Braking System (ABS) was standard. The steering was a rack and pinion system, providing precise and responsive handling. The 225/45 R17 tires offered a good balance of grip and ride comfort.
Market Reception & Comparison
The Astra H TwinTop 2.0i Turbo was generally well-received by automotive critics. It was praised for its stylish design, comfortable interior, and engaging driving experience. However, some reviewers noted that the convertible top mechanism reduced trunk space, and the car’s weight contributed to slightly less agile handling compared to the coupe version. Fuel economy was also a point of concern, as the turbocharged engine consumed more fuel than the base models. Compared to rivals like the Peugeot 206 CC and Renault Megane Coupe-Cabriolet, the Astra H TwinTop offered a competitive package in terms of performance, features, and price.
Legacy
The Opel Astra H TwinTop 2.0i Turbo remains a popular choice in the used car market, particularly among buyers seeking a stylish and affordable convertible. The Z20LEL engine is generally considered to be reliable, although regular maintenance is essential. Common issues include oil leaks and occasional turbocharger problems. The automatic transmission, when equipped, can be prone to wear and tear. Overall, the Astra H TwinTop 2.0i Turbo represents a well-rounded and enjoyable convertible that offers a good balance of performance, comfort, and style.
