The Ford Fiesta ST 1.5 EcoBoost, produced from November 2021 to July 2023, represents the performance-oriented variant of the eighth-generation Fiesta (Mk8), following its facelift. Positioned as the flagship model within the Fiesta range, the ST aimed to deliver a compelling hot hatch experience, blending spirited performance with everyday usability. This particular iteration, equipped with the 1.5-liter EcoBoost engine producing 200 horsepower, was exclusively offered with a six-speed manual transmission in the US market, catering to driving enthusiasts. It served as a direct competitor to vehicles like the Volkswagen Polo GTI and Hyundai i20 N, offering a more engaging driving experience than the standard Fiesta models.
Technical Specifications
| Brand | Ford |
| Model | Fiesta |
| Generation | Fiesta VIII (Mk8, facelift 2022) 5 door |
| Type (Engine) | ST 1.5 EcoBoost (200 Hp) |
| Start of production | November, 2021 |
| End of production | July, 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption at Low speed (WLTP) | 8.6-8.7 l/100 km (27.4 – 27 US mpg, 32.8 – 32.5 UK mpg, 11.6 – 11.5 km/l) |
| Fuel consumption at Medium speed (WLTP) | 6.3-6.4 l/100 km (37.3 – 36.8 US mpg, 44.8 – 44.1 UK mpg, 15.9 – 15.6 km/l) |
| Fuel consumption at high speed (WLTP) | 5.8-5.9 l/100 km (40.6 – 39.9 US mpg, 48.7 – 47.9 UK mpg, 17.2 – 16.9 km/l) |
| Fuel consumption at very high speed (WLTP) | 7 l/100 km (33.6 US mpg, 40.4 UK mpg, 14.3 km/l) |
| Combined fuel consumption (WLTP) | 6.7-6.8 l/100 km (35.1 – 34.6 US mpg, 42.2 – 41.5 UK mpg, 14.9 – 14.7 km/l) |
| CO2 emissions (WLTP) | 151-153 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.5 sec |
| Acceleration 0 – 62 mph | 6.5 sec |
| Acceleration 0 – 60 mph | 6.2 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 6 kg/Hp, 166 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 265.6 Nm/tonne |
| Power | 200 Hp @ 6000 rpm |
| Power per litre | 133.7 Hp/l |
| Torque | 320 Nm @ 1600-4000 rpm (236.02 lb.-ft. @ 1600-4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | YZJA |
| Engine displacement | 1496 cm3 (91.29 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 9.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.75 l (5.02 US qt | 4.18 UK qt) |
| Coolant | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 1205 kg (2656.57 lbs.) |
| Max. weight | 1660 kg (3659.67 lbs.) |
| Max load | 455 kg (1003.1 lbs.) |
| Trunk (boot) space – minimum | 292 l (10.31 cu. ft.) |
| Trunk (boot) space – maximum | 1093 l (38.6 cu. ft.) |
| Fuel tank capacity | 42 l (11.1 US gal | 9.24 UK gal) |
| Length | 4091 mm (161.06 in.) |
| Width | 1735 mm (68.31 in.) |
| Width with mirrors folded | 1783 mm (70.2 in.) |
| Width including mirrors | 1941 mm (76.42 in.) |
| Height | 1487 mm (58.54 in.) |
| Wheelbase | 2493 mm (98.15 in.) |
| Front track | 1504 mm (59.21 in.) |
| Rear (Back) track | 1472 mm (57.95 in.) |
| Front overhang | 865 mm (34.06 in.) |
| Rear overhang | 733 mm (28.86 in.) |
| Ride height (ground clearance) | 126 mm (4.96 in.) |
| Minimum turning circle (turning diameter) | 11 m (36.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Torsion |
| Front brakes | Ventilated discs, 278×23 mm |
| Rear brakes | Disc, 253×12 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 205/45 R17; 205/40 R18 |
| Wheel rims size | 7.5J x 17; 7.5J x 18 |
Powertrain & Engine Architecture
The heart of the Fiesta ST is the 1.5-liter EcoBoost inline-three cylinder engine, bearing the code YZJA. This engine is a significant departure from the 1.6-liter unit used in the previous generation ST. The YZJA features direct fuel injection, a single scroll turbocharger, and an intercooler to maximize power and efficiency. The cylinder head utilizes a dual overhead camshaft (DOHC) configuration with four valves per cylinder, optimizing airflow. A key feature is the inclusion of a particulate filter to meet stringent Euro 6d emission standards. The engine’s 9.7:1 compression ratio strikes a balance between performance and fuel economy. The six-speed manual transmission provides precise gear changes and enhances the driving experience. The transmission’s gear ratios are tuned for spirited acceleration, with a relatively short final drive to maximize responsiveness.
Driving Characteristics
The Fiesta ST 1.5 EcoBoost delivers a noticeably engaging driving experience. The 200 horsepower and 320 Nm (236 lb-ft) of torque, available from 1600-4000 rpm, provide strong acceleration. The 0-60 mph sprint is dispatched in approximately 6.2 seconds, and the car reaches a top speed of 230 km/h (143 mph). The manual transmission allows for precise control, and the short gear ratios contribute to the car’s eagerness to rev. Compared to lower-powered Fiesta variants, the ST offers significantly more punch, particularly in the mid-range. While the three-cylinder engine isn’t as smooth as a four-cylinder, it provides a distinctive exhaust note that adds to the sporty character. The chassis is well-balanced, and the steering is precise and communicative, making the Fiesta ST a joy to drive on winding roads.
Equipment & Trim Levels
The Fiesta ST came well-equipped as standard. Key features included sport seats with enhanced bolstering, a flat-bottomed steering wheel, and unique ST badging throughout the interior and exterior. The infotainment system typically featured a touchscreen display with Apple CarPlay and Android Auto compatibility. Standard safety equipment included ABS, electronic stability control, and multiple airbags. Optional extras included a Bang & Olufsen sound system, heated front seats, and a rear-view camera. Interior upholstery was typically a combination of cloth and leather-style materials, with contrasting stitching to emphasize the sporty theme.
Chassis & Braking
The Fiesta ST features a McPherson strut front suspension and a torsion beam rear suspension. The suspension is tuned for a firmer ride than standard Fiesta models, providing improved handling and body control. The front anti-roll bar is thicker than on other Fiesta variants, further reducing body roll. The braking system consists of ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) is standard. The ST’s chassis is noticeably stiffer than other Fiesta models, contributing to its improved handling characteristics.
Market Reception & Comparison
The Fiesta ST 1.5 EcoBoost was widely praised by automotive critics for its engaging driving dynamics, responsive engine, and affordable price. It was consistently ranked among the best hot hatches in its class. Compared to the standard Fiesta models, the ST offered a significant performance upgrade and a more focused driving experience. Fuel economy, while not exceptional, was reasonable for a performance car, averaging around 35 mpg in combined driving. Reliability was generally good, although some owners reported minor issues with the turbocharger and cooling system.
Legacy
The Fiesta ST 1.5 EcoBoost has established itself as a popular choice among driving enthusiasts. Its combination of performance, handling, and affordability has made it a sought-after used car. The 1.5 EcoBoost engine, while relatively small, has proven to be durable and reliable when properly maintained. As production of the Fiesta has ended, the ST variant is likely to become a future classic, appreciated for its engaging driving experience and sporty character. The Fiesta ST’s success demonstrates Ford’s commitment to producing fun-to-drive, accessible performance cars.
