The Vauxhall Astra Mk VI GTC 1.4 EcoFLEX (100 hp) was a front-wheel-drive, three-door hatchback produced between July 2011 and 2012. Positioned as an entry-level variant within the Mk VI GTC (Grand Touring Coupe) range, it aimed to offer a balance of affordability and fuel efficiency. This model was part of the larger Astra J series (Mk VI), built on the GM Delta II platform, also known as the 1HX0/A3 platform. The GTC body style, characterized by its sporty three-door configuration, was intended to appeal to buyers seeking a more dynamic and visually appealing alternative to the five-door Astra hatchback.
Technical Specifications
| Brand | Vauxhall |
| Model | Astra |
| Generation | Astra Mk VI GTC |
| Type (Engine) | 1.4 EcoFLEX (100 Hp) |
| Start of production | July, 2011 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 3 |
| Fuel consumption (urban) | 7.1 l/100 km (33.1 US mpg, 39.8 UK mpg, 14.1 km/l) |
| Fuel consumption (extra urban) | 4.9 l/100 km (48 US mpg, 57.6 UK mpg, 20.4 km/l) |
| Fuel consumption (combined) | 5.9 l/100 km (39.9 US mpg, 47.9 UK mpg, 16.9 km/l) |
| CO2 emissions | 139 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 14.5 sec |
| Acceleration 0 – 62 mph | 14.5 sec |
| Acceleration 0 – 60 mph | 13.8 sec |
| Maximum speed | 179 km/h (111.23 mph) |
| Weight-to-power ratio | 13.2 kg/Hp, 75.7 Hp/tonne |
| Weight-to-torque ratio | 10.2 kg/Nm, 98.4 Nm/tonne |
| Power | 100 Hp @ 6000 rpm |
| Power per litre | 71.5 Hp/l |
| Torque | 130 Nm @ 4000 rpm (95.88 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | A14XER |
| Engine displacement | 1398 cm3 (85.31 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant capacity | 6.2 l (6.55 US qt | 5.46 UK qt) |
| Kerb Weight | 1321 kg (2912.31 lbs.) |
| Max. weight | 1881 kg (4146.9 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Trunk (boot) space – minimum | 371 l (13.1 cu. ft.) |
| Fuel tank capacity | 56 l (14.79 US gal | 12.32 UK gal) |
| Length | 4466 mm (175.83 in.) |
| Width | 1840 mm (72.44 in.) |
| Width including mirrors | 2020 mm (79.53 in.) |
| Height | 1489 mm (58.62 in.) |
| Wheelbase | 2695 mm (106.1 in.) |
| Front track | 1585 mm (62.4 in.) |
| Rear track | 1588 mm (62.52 in.) |
| Minimum turning circle | 11.4 m (37.4 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 5 |
| Gearbox type | Manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
Powertrain & Engine Architecture
The 1.4 EcoFLEX GTC utilized the A14XER engine code, a 1398cc inline-four cylinder petrol engine. This engine was part of Vauxhall/Opel’s ‘family 1’ engine series. It featured direct fuel injection, a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, and a relatively high compression ratio designed to maximize efficiency. The direct injection system allowed for precise fuel delivery, contributing to improved fuel economy and reduced emissions. The engine’s 100 horsepower output at 6000 rpm and 130 Nm (95.88 lb-ft) of torque at 4000 rpm were modest, but sufficient for everyday driving. The engine was paired with a five-speed manual transmission, chosen for its efficiency and lower cost compared to an automatic option. The transmission’s gear ratios were tuned for fuel economy rather than outright performance.
Driving Characteristics
The 1.4 EcoFLEX GTC offered a comfortable, if not particularly exhilarating, driving experience. Acceleration was leisurely, taking around 14.5 seconds to reach 62 mph. The engine felt strained when pushed hard, particularly when overtaking or climbing hills. The five-speed manual transmission required frequent shifting to maintain momentum. Compared to higher-output Astra GTC variants, such as those equipped with the 1.6-liter turbocharged engine or the 2.0-liter CDTi diesel, the 1.4 EcoFLEX felt significantly underpowered. However, its lighter weight and efficient engine contributed to respectable fuel economy, making it a practical choice for urban commuting and longer journeys where outright speed wasn’t a priority. The steering was light and precise, and the suspension provided a reasonably comfortable ride, although it could feel somewhat unsettled on rough road surfaces.
Equipment & Trim Levels
The 1.4 EcoFLEX GTC typically came with a fairly basic level of standard equipment. Interior features generally included cloth upholstery, air conditioning, a CD/radio system with auxiliary input, and electric front windows. Safety features included ABS, front and side airbags, and stability control. Optional extras included alloy wheels, upgraded audio systems, parking sensors, and climate control. The EcoFLEX trim level often featured specific aerodynamic enhancements and low rolling resistance tires to further improve fuel efficiency. The dashboard layout was typical of the Astra J, with a clean and functional design. Interior plastics were of reasonable quality, but the overall ambiance was somewhat utilitarian.
Chassis & Braking
The Astra Mk VI GTC utilized a MacPherson strut front suspension and a torsion beam rear suspension. This setup provided a good balance of ride comfort and handling. The front brakes were ventilated discs, while the rear brakes were solid discs. The braking system was adequate for the car’s performance, but lacked the stopping power of higher-spec Astra GTC models. The electric power steering provided light and precise steering feel. The GTC’s chassis was relatively lightweight, contributing to its fuel efficiency and agility. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The 1.4 EcoFLEX GTC was generally well-received by critics as an affordable and fuel-efficient option within the Astra GTC range. However, its lack of outright performance was often noted. Compared to the 1.6-liter turbocharged version, the 1.4 EcoFLEX offered significantly lower power and acceleration, but also lower running costs. The diesel-powered CDTi variants provided even better fuel economy and more torque, but at a higher purchase price. The 1.4 EcoFLEX appealed to buyers who prioritized fuel efficiency and affordability over performance. Its relatively low CO2 emissions also made it an attractive option for environmentally conscious buyers.
Legacy
The A14XER engine, while generally reliable, is known to have some potential issues, including occasional oil leaks and problems with the timing chain. Regular maintenance, including oil changes and timing chain inspections, is crucial to ensure long-term reliability. Today, the Astra Mk VI GTC 1.4 EcoFLEX can be found on the used car market at very affordable prices. It represents a practical and economical choice for buyers seeking a small, three-door hatchback. While it may not offer the performance or refinement of more expensive Astra GTC variants, its fuel efficiency and low running costs make it a sensible option for everyday transportation. Its status as an entry-level model means that many examples will have accumulated high mileage, so a thorough inspection is recommended before purchase.
