The Vauxhall Astra Mk IV Convertible 1.6 16V, produced between 2000 and 2004, represented a popular entry point into the world of open-top motoring for British buyers. Positioned as the base engine option for the convertible body style, it offered a more affordable alternative to the higher-specification models. This variant was built on the Astra G platform (Mk IV), sharing its underpinnings with other Astra models but distinguished by its folding soft-top roof and focus on providing a stylish, accessible convertible experience. It aimed to capture a segment of the market seeking a fun, practical, and relatively economical open-air vehicle.
Technical Specifications
| Brand | Vauxhall |
| Model | Astra |
| Generation | Astra Mk IV Convertible |
| Type (Engine) | 1.6 16V (100 Hp) |
| Start of production | 2000 |
| End of production | 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 9.7 l/100 km (24.2 US mpg, 29.1 UK mpg, 10.3 km/l) |
| Fuel consumption (extra urban) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Fuel consumption (combined) | 7.1 l/100 km (33.1 US mpg, 39.8 UK mpg, 14.1 km/l) |
| CO2 emissions | 170 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 13 sec |
| Acceleration 0 – 62 mph | 13 sec |
| Acceleration 0 – 60 mph | 12.4 sec |
| Maximum speed | 190 km/h (118.06 mph) |
| Power | 100 Hp @ 6000 rpm |
| Power per litre | 62.6 Hp/l |
| Torque | 150 Nm @ 3600 rpm (110.63 lb.-ft. @ 3600 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Z16XE |
| Engine displacement | 1598 cm3 (97.52 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Engine aspiration | Naturally aspirated |
| Engine oil capacity | 3.25 l (3.43 US qt, 2.86 UK qt) |
| Coolant capacity | 6.3 l (6.66 US qt, 5.54 UK qt) |
| Max. weight | 1695 kg (3736.84 lbs) |
| Trunk (boot) space (minimum) | 330 l (11.65 cu. ft.) |
| Fuel tank capacity | 52 l (13.74 US gal, 11.44 UK gal) |
| Length | 4267 mm (167.99 in) |
| Width | 1709 mm (67.28 in) |
| Width including mirrors | 1989 mm (78.31 in) |
| Height | 1390 mm (54.72 in) |
| Wheelbase | 2606 mm (102.6 in) |
| Front track | 1474 mm (58.03 in) |
| Rear track | 1462 mm (57.56 in) |
| Ride height (ground clearance) | 130 mm (5.12 in) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 10 m (32.81 ft) |
| Drivetrain Architecture | Front wheel drive, Internal Combustion Engine |
| Number of gears | 5 |
| Gearbox type | Manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Tires size | 195/60 R15 |
| Wheel rims size | 15 |
Powertrain & Engine Architecture
The heart of the Astra Mk IV Convertible 1.6 16V is the Z16XE engine, a 1.6-liter inline-four cylinder petrol engine. This engine is a naturally aspirated unit, meaning it doesn’t employ forced induction like a turbocharger or supercharger. It features a dual overhead camshaft (DOHC) design with four valves per cylinder, contributing to its relatively efficient breathing. Fuel delivery is managed by a multi-point fuel injection system. The Z16XE is known for its relative simplicity and robustness, though it doesn’t offer the outright performance of larger engines in the Astra range. The engine is transversely mounted, driving the front wheels. Paired with a five-speed manual transmission, the powertrain aimed for a balance between fuel economy and acceptable performance for everyday driving.
Driving Characteristics
The 100 horsepower and 110 lb-ft of torque produced by the 1.6-liter engine translate to a 0-60 mph time of around 12.4 seconds, and a top speed of 118 mph. While not particularly quick, the engine provides adequate power for typical urban and highway driving. The five-speed manual gearbox is well-matched to the engine’s characteristics, allowing drivers to keep the engine in its optimal power band. Compared to the more powerful 1.8 or 2.0-liter versions, the 1.6 feels noticeably less responsive, particularly when fully loaded or tackling steep inclines. However, the lighter weight of the engine contributes to slightly improved handling and fuel economy. The gear ratios are fairly standard for the era, prioritizing fuel efficiency over outright acceleration.
Equipment & Trim Levels
The 1.6 16V Convertible typically came with a fairly basic level of equipment, reflecting its position as the entry-level model. Standard features generally included central locking, power steering, and an AM/FM radio. Interior upholstery was typically cloth, and the dashboard featured a functional, if somewhat utilitarian, design. Optional extras included alloy wheels, air conditioning, and a more sophisticated audio system. The convertible top was manually operated, adding to the simplicity and reducing the overall cost. Trim levels varied slightly depending on the year and specific market, but generally focused on adding cosmetic enhancements and convenience features.
Chassis & Braking
The Astra Mk IV Convertible utilized a MacPherson strut front suspension and a torsion beam rear suspension. This setup provided a reasonable compromise between ride comfort and handling. Braking duties were handled by ventilated discs at the front and solid discs at the rear. The braking system was adequate for the car’s performance, but lacked the stopping power of higher-specification models with larger brakes. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering. The suspension was tuned for comfort, prioritizing a smooth ride over sporty handling.
Market Reception & Comparison
The Astra Mk IV Convertible 1.6 16V was generally well-received as an affordable and stylish entry into the convertible market. Critics praised its attractive design and relatively low price point. However, the engine’s performance was often cited as a drawback, with some reviewers noting its lack of power, especially when compared to competitors. Fuel economy was considered reasonable for the time, and the car’s reliability was generally good. Compared to the 1.8 and 2.0-liter versions, the 1.6 offered a lower purchase price and slightly better fuel economy, but at the expense of performance. The 1.9 TDI diesel version offered significantly better fuel economy but lacked the open-air appeal of the convertible.
Legacy
The Z16XE engine, while not known for being particularly exciting, proved to be a reliable unit when properly maintained. Today, the Astra Mk IV Convertible 1.6 16V can be found on the used car market at relatively affordable prices. Common issues include wear and tear on the convertible top mechanism and potential corrosion, particularly in areas exposed to salt. The engine itself is generally robust, but regular servicing is essential to ensure its longevity. The car remains a popular choice for those seeking a classic, affordable convertible, offering a taste of open-air motoring without breaking the bank. Its simplicity and relatively low running costs make it an appealing option for enthusiasts and first-time convertible owners alike.
