Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) Automatic: An Expert Overview
The sixth generation of the iconic Ford Mustang, internally designated S550, marked a pivotal moment in the history of the legendary American pony car. Launched for the 2015 model year, this iteration was the first Mustang designed from the ground up to be a global vehicle, officially sold in markets around the world, including right-hand drive variants. This article focuses on a particularly desirable variant from its initial production run: the Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) Automatic. Produced between 2015 and 2017, this model combined the visceral thrill of a naturally aspirated V8 engine with the open-air experience of a convertible, delivering a compelling blend of performance, style, and heritage that resonated deeply with automotive enthusiasts globally. It represented a significant leap forward in refinement and technology for the Mustang nameplate while staying true to its muscle car roots.
Engine and Performance of the Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) Automatic
At the heart of the Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) Automatic lies the revered “Coyote” V8 engine, a powerplant synonymous with modern Mustang performance. This naturally aspirated 4.95-liter (302.13 cubic inches) unit, designated with the engine code Coyote, is a testament to traditional American V8 engineering combined with modern technological advancements. It features a DOHC (Dual Overhead Camshaft) valvetrain with four valves per cylinder, ensuring efficient airflow and high-revving capability. The Ti-VCT (Twin Independent Variable Camshaft Timing) system further optimizes valve overlap for improved power delivery across the rev range and enhanced fuel efficiency.
In this specific configuration, the Coyote V8 generates a robust 421 horsepower at 6500 rpm, providing exhilarating acceleration and a thrilling soundtrack. Torque output is equally impressive, peaking at 390.91 lb.-ft. (530 Nm) at a relatively accessible 4250 rpm, ensuring strong pull from low speeds and effortless highway cruising. Power is transmitted to the rear wheels via a smooth and responsive 6-speed automatic transmission, a popular choice that balances performance with everyday drivability, allowing for quick shifts and comfortable long-distance travel.
Despite its substantial power, the Mustang GT Convertible maintains a respectable weight-to-power ratio of 4.3 kg per horsepower (234.9 Hp per tonne) and a weight-to-torque ratio of 3.4 kg per Newton-meter (295.8 Nm per tonne), indicative of its strong performance characteristics. Fuel economy for the combined cycle is rated at 18.4 US mpg (12.8 l/100 km), with CO2 emissions of 289 g/km, figures typical for a high-performance V8 convertible of this era. The engine’s multi-port manifold injection system ensures precise fuel delivery, contributing to both performance and efficiency. Its impressive power per liter of 85 Hp/l highlights the engineering prowess behind this iconic engine.
Design and Features
The Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) Automatic embodies a contemporary interpretation of classic Mustang styling cues, infused with modern aerodynamic principles. As a two-door cabriolet, it offers seating for four, combining the practicality of occasional rear seating with the undeniable appeal of open-top motoring. The power-operated soft top allows for quick transitions between a coupe-like driving experience and a breezy convertible ride.
Dimensionally, the sixth-generation Mustang Convertible measures 188.35 inches in length, 75.43 inches in width (81.89 inches including mirrors), and 54.88 inches in height, with a wheelbase of 107.09 inches. These proportions give it a muscular, planted stance characteristic of the Mustang lineage. The design features a prominent grille, aggressive headlights, and a sculpted body that pays homage to its predecessors while adopting a more sophisticated, international aesthetic.
A significant engineering upgrade for the S550 generation was the adoption of an independent rear suspension (IRS), replacing the live rear axle of previous generations. This change dramatically improved ride quality, handling dynamics, and overall refinement, especially when tackling uneven surfaces or spirited cornering. The front suspension employs an independent McPherson-type setup, further contributing to precise steering and control. Stopping power is provided by ventilated disc brakes at both the front and rear, complemented by an Anti-lock Braking System (ABS) for enhanced safety and stability. The steering system is a responsive rack and pinion type, offering good feedback to the driver.
The vehicle rides on 19-inch wheels, shod with staggered tire sizes: 255/40 R19 at the front and wider 275/40 R19 at the rear. This setup optimizes grip and handling, particularly under acceleration. Inside, the cabin blends retro-inspired elements with modern amenities, offering a comfortable and driver-focused environment. The trunk space is a practical 11.72 cubic feet (332 liters), sufficient for weekend getaways, and the fuel tank capacity stands at 16.11 US gallons (61 liters), providing a decent range for extended drives.
Technical Specifications
| Category | Specification |
|---|---|
| General Information | |
| Brand | Ford |
| Model | Mustang |
| Generation | Mustang Convertible VI |
| Type (Engine) | GT 5.0 Ti-VCT V8 (421 Hp) Automatic |
| Production Start | 2015 |
| Production End | 2017 |
| Powertrain Architecture | Internal Combustion Engine |
| Body Type | Cabriolet (Convertible) |
| Seats | 4 |
| Doors | 2 |
| Performance Specs | |
| Fuel Consumption (Combined) | 18.4 US mpg (12.8 l/100 km) |
| CO2 Emissions | 289 g/km |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-Power Ratio | 4.3 kg/Hp (234.9 Hp/tonne) |
| Weight-to-Torque Ratio | 3.4 kg/Nm (295.8 Nm/tonne) |
| Engine Specs | |
| Power | 421 Hp @ 6500 rpm |
| Power per Liter | 85 Hp/l |
| Torque | 390.91 lb.-ft. @ 4250 rpm (530 Nm @ 4250 rpm) |
| Engine Layout | Front, Longitudinal |
| Engine Model/Code | Coyote |
| Engine Displacement | 4.951 liters (4951 cm3 / 302.13 cu. in.) |
| Number of Cylinders | 8 |
| Engine Configuration | V-engine |
| Cylinder Bore | 3.63 in. (92.2 mm) |
| Piston Stroke | 3.65 in. (92.7 mm) |
| Compression Ratio | 11:1 |
| Valves per Cylinder | 4 |
| Fuel Injection System | Multi-port manifold injection |
| Engine Aspiration | Naturally aspirated |
| Valvetrain | DOHC |
| Engine Oil Capacity | 8.03 US qt (7.6 l) |
| Engine Oil Specification | Data unavailable |
| Coolant Capacity | 13.61 US qt (12.88 l) |
| Space, Volume, and Weights | |
| Kerb Weight | 3950.68 lbs. (1792 kg) |
| Trunk (Boot) Space – Minimum | 11.72 cu. ft. (332 l) |
| Fuel Tank Capacity | 16.11 US gal (61 l) |
| Dimensions | |
| Length | 188.35 in. (4784 mm) |
| Width | 75.43 in. (1916 mm) |
| Width with Mirrors Folded | 77.01 in. (1956 mm) |
| Width Including Mirrors | 81.89 in. (2080 mm) |
| Height | 54.88 in. (1394 mm) |
| Wheelbase | 107.09 in. (2720 mm) |
| Front Track | 62.28 in. (1582 mm) |
| Rear Track | 65.16 in. (1655 mm) |
| Minimum Turning Circle | 40.03 ft. (12.2 m) |
| Drivetrain, Brakes, and Suspension | |
| Drivetrain Architecture | Internal Combustion Engine (ICE) drives the rear wheels. |
| Drive Wheel | Rear-wheel drive |
| Number of Gears and Type | 6 gears, automatic transmission |
| Front Suspension | Independent type McPherson |
| Rear Suspension | Independent multi-link spring suspension with stabilizer |
| Front Brakes | Ventilated discs |
| Rear Brakes | Ventilated discs |
| Assisting Systems | ABS (Anti-lock braking system) |
| Steering Type | Steering rack and pinion |
| Tires Size | Front: 255/40 R19; Rear: 275/40 R19 |
| Wheel Rims Size | 19 inches |
Legacy and Market Impact
The sixth-generation Ford Mustang, and particularly the GT Convertible with the 5.0-liter V8, holds a significant place in the Mustang’s storied history and the broader automotive landscape. Its introduction as a truly global car was a monumental shift, allowing enthusiasts in markets previously deprived of official Mustang sales to experience the American icon firsthand. This expanded reach fueled its reputation as a global performance bargain, offering V8 power and a convertible experience at a price point that few competitors could match.
In its primary market, the United States, the Mustang GT Convertible continued its long-standing rivalry with other domestic pony and muscle cars, most notably the Chevrolet Camaro Convertible and the Dodge Challenger. While the Challenger leaned into retro muscle, and the Camaro offered sharp handling, the S550 Mustang struck a balance, blending modern sophistication with traditional V8 grunt. The inclusion of the independent rear suspension was a game-changer, silencing critics who had long pointed to the live axle as a handling detriment. This upgrade elevated the Mustang’s dynamic capabilities, making it a more refined and capable sports car on twisty roads and track days, without sacrificing its straight-line performance heritage.
The 2015-2017 Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) Automatic carved out a strong niche for itself, appealing to buyers who desired the raw emotion of a V8, the freedom of a convertible, and the prestige of the Mustang badge. Its robust performance, distinctive styling, and improved chassis dynamics ensured its popularity and cemented its status as a modern classic. It proved that the Mustang could evolve, embrace global markets, and incorporate advanced engineering while still retaining the soul that has captivated generations of drivers. The Coyote V8, in particular, became a beloved engine, celebrated for its power, reliability, and unmistakable sound, contributing significantly to the model’s enduring legacy.
