Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp)
The Ford Mustang, an icon of American automotive culture, entered its sixth generation (S550) with significant fanfare, marking a pivotal moment in its illustrious history. Among its most celebrated variants was the Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp), produced between 2015 and 2017. This particular model represented the quintessential modern pony car: a powerful, rear-wheel-drive convertible blending classic Mustang aesthetics with contemporary engineering and performance. The S550 generation was groundbreaking, being the first Mustang designed from the outset for global markets, thus introducing the legendary nameplate to a much wider international audience with both left-hand and right-hand drive configurations. This convertible GT variant, with its potent 5.0-liter V8 engine and traditional manual transmission, offered an exhilarating open-air driving experience, solidifying the Mustang’s position as an accessible performance machine with undeniable curb appeal.
Engine and Performance: The Heart of the Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp)
At the core of the Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) lies the revered “Coyote” 5.0-liter V8 engine, a powerplant synonymous with modern Mustang performance. This naturally aspirated, all-aluminum engine, designated by its internal code, was meticulously engineered to deliver a thrilling driving experience. It produced a robust 421 horsepower at 6500 rpm and 390.91 lb.-ft. of torque at 4250 rpm, providing ample thrust for both spirited acceleration and effortless highway cruising. The engine’s high-revving nature and linear power delivery were characteristic of a performance-oriented V8, further enhanced by its DOHC (Dual Overhead Camshaft) valvetrain with four valves per cylinder.
A key technological highlight was Ford’s Twin Independent Variable Cam Timing (Ti-VCT) system. This advanced technology allowed for precise control over both intake and exhaust valve timing, optimizing engine performance across the entire rev range, improving fuel efficiency, and reducing emissions. Fuel delivery was handled by a multi-port manifold injection system, ensuring consistent and efficient combustion. With a compression ratio of 11:1, the Coyote V8 was designed for premium gasoline, extracting maximum power from every drop.
Power was channeled to the rear wheels via a crisp 6-speed manual transmission, offering enthusiasts a direct and engaging connection to the powertrain. This classic combination of a powerful V8 and a manual gearbox underscored the Mustang GT’s driver-centric philosophy. The vehicle’s weight-to-power ratio of 4.2 kg/Hp (or 235.7 Hp/tonne) and a weight-to-torque ratio of 3.4 kg/Nm (or 296.8 Nm/tonne) highlighted its impressive capability, ensuring strong acceleration and responsive dynamics. Despite its performance credentials, the convertible GT recorded a combined fuel economy of 17.3 US mpg, a respectable figure for a vehicle of its power and displacement, though CO2 emissions stood at 306 g/km, reflecting its potent nature.
Design and Features: Open-Air American Muscle
The sixth-generation Ford Mustang Convertible represented a significant evolution in design, blending contemporary styling cues with unmistakable heritage elements. The convertible body type, featuring two doors and seating for four, maintained the classic proportions of the Mustang while incorporating a more modern and athletic stance. Its overall length of 188.35 inches, width of 75.43 inches (81.89 inches including mirrors), and height of 54.88 inches gave it a substantial and commanding presence on the road. The design was characterized by a lower, wider profile than its predecessors, featuring a more aggressive grille, sculpted flanks, and the iconic tri-bar LED taillights.
Underneath its stylish exterior, the S550 Mustang introduced a game-changing feature: an independent rear suspension (IRS). This was a monumental shift from the live rear axle found in previous generations, dramatically improving ride quality, handling, and stability, particularly when navigating corners or uneven road surfaces. The front suspension utilized an independent McPherson strut design, further contributing to the car’s refined driving dynamics. Stopping power was provided by robust ventilated disc brakes on both the front and rear axles, complemented by an Anti-lock Braking System (ABS) for enhanced safety and control. The steering system was a precise rack and pinion setup, offering responsive feedback to the driver.
The GT Convertible rode on distinctive 19-inch wheels, shod with staggered tire sizes: 255/40 R19 at the front and wider 275/40 R19 at the rear. This setup optimized grip and handling balance, especially given the car’s rear-wheel-drive architecture. The curb weight of 3937.46 lbs reflected the structural reinforcements necessary for a convertible, ensuring body rigidity and safety. Inside, the cabin offered a driver-focused cockpit, blending retro-inspired toggle switches with modern digital displays and quality materials. Despite its performance focus, the convertible still offered practical elements, including a minimum trunk space of 11.72 cu. ft., making it suitable for weekend getaways.
Technical Specifications
| Category | Specification |
|---|---|
| Brand | Ford |
| Model | Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) |
| Production Years | 2015 – 2017 |
| Body Type | Cabriolet (Convertible) |
| Seats | 4 |
| Doors | 2 |
| Performance | |
| Power | 421 Hp @ 6500 rpm |
| Torque | 390.91 lb.-ft. (530 Nm) @ 4250 rpm |
| Fuel Consumption (Combined) | 17.3 US mpg (13.6 l/100 km) |
| CO2 Emissions | 306 g/km |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-Power Ratio | 4.2 kg/Hp (235.7 Hp/tonne) |
| Weight-to-Torque Ratio | 3.4 kg/Nm (296.8 Nm/tonne) |
| Engine | |
| Engine Layout | Front, Longitudinal |
| Engine Model/Code | Coyote |
| Engine Displacement | 302.13 cu. in. (4951 cm3) |
| 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 engine |
| Valvetrain | DOHC |
| Engine Oil Capacity | 8.03 US qt (7.6 l) |
| Coolant Capacity | 13.61 US qt (12.88 l) |
| Dimensions & Weights | |
| Kerb Weight | 3937.46 lbs (1786 kg) |
| 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) |
| Trunk Space (minimum) | 11.72 cu. ft. (332 l) |
| Fuel Tank Capacity | 16.11 US gal (61 l) |
| Drivetrain, Brakes & Suspension | |
| Drivetrain Architecture | Internal combustion engine drives the rear wheels. |
| Drive Wheel | Rear wheel drive |
| Gearbox Type | 6 gears, manual 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 its 5.0-liter V8, carved out a significant legacy during its production run from 2015 to 2017. It continued the Mustang’s tradition of offering compelling performance and iconic styling at a relatively accessible price point, making it a strong contender in the American pony car segment. Its direct competitors included the Chevrolet Camaro SS Convertible and the Dodge Challenger R/T Scat Pack, each offering their own take on American muscle. However, the S550 Mustang distinguished itself with its more modern, globally-tuned chassis and the introduction of independent rear suspension, which elevated its handling prowess beyond previous generations.
The global launch of the S550 was arguably its most significant historical impact. For the first time, the Mustang was officially sold in numerous international markets, including Europe and Asia, where it garnered critical acclaim and strong sales. This expanded reach turned the Mustang from a purely American icon into a globally recognized sports car, admired for its blend of classic V8 charm and contemporary driving dynamics. The convertible GT, in particular, resonated with buyers looking for a visceral, open-air driving experience with the unmistakable rumble of a naturally aspirated V8.
Its reputation for robust performance, improved handling, and iconic design ensured its place as a desirable vehicle, both new and in the used car market. The Ford Mustang Convertible VI GT 5.0 Ti-VCT V8 (421 Hp) not only upheld the Mustang legend but also propelled it into a new era, proving that the pony car could evolve while staying true to its roots. It solidified the Mustang’s position as a performance bargain, offering a thrilling experience that few rivals could match for the price, cementing its status as a beloved automotive staple.
