The Ford Mustang Convertible VI 2.3 EcoBoost (309 Hp) represents a significant evolution in the Mustang lineage, launched for the 2015 model year as part of the sixth generation (S550). This iteration marked a departure from previous models, transforming the Mustang into a truly global vehicle. Produced between 2015 and 2017 in this specific configuration, the 2.3 EcoBoost Convertible combined the iconic Mustang aesthetic with the efficiency of Ford’s turbocharged EcoBoost technology. It was strategically positioned to broaden the Mustang’s appeal, particularly in markets where smaller displacement engines were favored, and to offer a more accessible entry point into the Mustang experience compared to the V6 and V8 models.
Powertrain & Engine Architecture
The heart of the Ford Mustang Convertible VI 2.3 EcoBoost is a 2.3-liter (2264 cm3 or 138.16 cu. in.) inline-four cylinder engine. This engine, part of Ford’s EcoBoost family, utilizes direct fuel injection, a twin-scroll turbocharger, and an intercooler to achieve a high level of performance. The engine produces 309 horsepower at 5500 rpm and 300.19 lb-ft of torque between 2500 and 4500 rpm. This broad torque band provides responsive acceleration and strong drivability in various driving conditions.
Power is delivered to the rear wheels via a 6-speed manual transmission, maintaining the classic Mustang rear-wheel-drive configuration. The engine is mounted longitudinally in the front of the vehicle, contributing to a balanced weight distribution. The engine features a 9.5:1 compression ratio and a Dual Overhead Camshaft (DOHC) valvetrain with four valves per cylinder. The fuel injection system is direct injection, optimizing fuel delivery and combustion efficiency. The engine oil capacity is 5.4 liters (5.71 US quarts), and the cooling system holds 8.96 liters (9.47 US quarts).
Driving Characteristics
The 2.3 EcoBoost engine in the Mustang Convertible provides a distinct driving experience compared to the V6 and V8 options. While lacking the raw power of the larger engines, the EcoBoost offers a more balanced and refined feel. The turbocharger provides a noticeable boost in power, delivering quick acceleration, particularly in the mid-range. The 6-speed manual transmission allows for precise control and an engaging driving experience. Compared to the V8, the EcoBoost offers quicker steering response and a lighter front end, contributing to improved handling. The gear ratios are tuned to maximize acceleration and fuel efficiency, providing a good balance between performance and economy. While not as visceral as the V8, the EcoBoost engine delivers a satisfying and enjoyable driving experience, especially for everyday use and spirited driving on winding roads.
Equipment & Trim Levels
The 2.3 EcoBoost Convertible typically came standard with features such as air conditioning, power windows and locks, a rearview camera, and a basic audio system. Interior upholstery was typically cloth, though leather options were available. The dashboard featured a modern design with a central touchscreen display for infotainment functions. Optional extras included upgraded audio systems, navigation, heated and cooled seats, and various appearance packages. The EcoBoost trim generally sat in the mid-range of the Mustang lineup, offering a step up in performance and features compared to the base model while remaining more affordable than the V6 or V8 variants. Available packages often included upgraded wheels, performance brakes, and enhanced interior trim.
Chassis & Braking
The sixth-generation Mustang Convertible, including the 2.3 EcoBoost variant, benefited from a significant upgrade in chassis technology. It featured an independent rear suspension, a first for the Mustang, which dramatically improved ride comfort and handling. The front suspension utilized MacPherson struts, while the rear employed a multi-link setup. This configuration provided a more controlled and predictable ride compared to the solid rear axle found in previous generations. The braking system consisted of ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard. The steering system was an electric power-assisted rack and pinion, offering precise feedback and variable assist. The car rode on 17-inch wheel rims with 235/55 R17 tires, balancing grip, comfort, and durability.
Market Reception & Comparison
The 2.3 EcoBoost Mustang Convertible received generally positive reviews from critics. It was praised for its balanced performance, improved handling, and modern features. The EcoBoost engine was lauded for its responsiveness and fuel efficiency, making it an attractive option for buyers seeking a more economical Mustang experience. Compared to the V6, the EcoBoost offered a noticeable increase in power and a more engaging driving experience. Compared to the V8, it provided better fuel economy and a lighter, more agile feel. Fuel economy figures were approximately 22 US mpg (10.7 l/100 km) in urban driving, 30.9 US mpg (7.6 l/100 km) on the highway, and 26.1 US mpg (9 l/100 km) combined. Reliability was generally good, with the EcoBoost engine proving to be a durable and dependable powerplant. However, some owners reported minor issues with the turbocharger and fuel injection system.
Technical Specifications
| Category | Specification |
| Brand | Ford |
| Model | Mustang |
| Generation | Mustang Convertible VI |
| Type (Engine) | 2.3 EcoBoost (309 Hp) |
| Start of Production | 2015 |
| End of Production | 2017 |
| Powertrain Architecture | Internal Combustion engine |
| Body Type | Cabriolet (Convertible) |
| Seats | 4 |
| Doors | 2 |
| Fuel Consumption (Urban) | 10.7 l/100 km (22 US mpg) |
| Fuel Consumption (Extra Urban) | 7.6 l/100 km (30.9 US mpg) |
| Fuel Consumption (Combined) | 9 l/100 km (26.1 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Power | 309 Hp @ 5500 rpm |
| Torque | 407 Nm (300.19 lb.-ft.) @ 2500-4500 rpm |
| Engine Displacement | 2264 cm3 (138.16 cu. in.) |
| Compression Ratio | 9.5:1 |
| Engine Oil Capacity | 5.4 l (5.71 US qt) |
| Coolant Capacity | 8.96 l (9.47 US qt) |
| Length | 4783 mm (188.31 in.) |
| Width | 1915 mm (75.39 in.) |
| Height | 1394 mm (54.88 in.) |
| Wheelbase | 2720 mm (107.09 in.) |
Legacy
The Ford Mustang Convertible VI 2.3 EcoBoost (309 Hp) has proven to be a reliable and popular choice in the used car market. The EcoBoost engine has demonstrated good long-term durability, and maintenance costs are generally reasonable. The independent rear suspension and modern features contribute to a comfortable and enjoyable driving experience. The S550 Mustang, in general, has enjoyed a strong reputation for reliability, and the 2.3 EcoBoost engine has proven to be a robust and dependable powerplant. Today, these models are sought after by enthusiasts who appreciate the blend of performance, efficiency, and iconic Mustang styling. The 2.3 EcoBoost variant broadened the Mustang’s appeal and helped solidify its position as a global automotive icon, ensuring its continued relevance for years to come.
