The Ford Focus II ST 2.5i 20V, produced between 2005 and 2010, represented the high-performance variant of the second-generation Focus hatchback. Positioned as the flagship model, it aimed to deliver a more engaging driving experience than the standard Focus trims. Built on the C170 platform (internally designated as the 1HX0/A3 platform for the hatchback), the ST offered a significant power upgrade and a sport-tuned chassis. This model was primarily marketed in Europe, offering a direct competitor to vehicles like the Volkswagen Golf GTI and Opel/Vauxhall Astra OPC.
Technical Specifications
| Brand | Ford |
| Model | Focus |
| Generation | Focus II Hatchback |
| Type | ST 2.5 i 20V (225 Hp) |
| Start of production | 2005 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 3/5 |
| Fuel consumption (urban) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg, 7.2 km/l) |
| Fuel consumption (extra urban) | 6.8 l/100 km (34.6 US mpg, 41.5 UK mpg, 14.7 km/l) |
| Fuel consumption (combined) | 9.3 l/100 km (25.3 US mpg, 30.4 UK mpg, 10.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.8 sec |
| Acceleration 0 – 62 mph | 6.8 sec |
| Acceleration 0 – 60 mph | 6.5 sec |
| Maximum speed | 241 km/h (149.75 mph) |
| Weight-to-power ratio | 6.2 kg/Hp, 161.6 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 229.9 Nm/tonne |
| Power | 225 Hp @ 6000 rpm |
| Power per litre | 89.2 Hp/l |
| Torque | 320 Nm @ 1600 rpm (236.02 lb.-ft. @ 1600 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | HYDA |
| Engine displacement | 2522 cm3 (153.9 cu. in.) |
| Number of cylinders | 5 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 93.2 mm (3.67 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.8 l (6.13 US qt | 5.1 UK qt) |
| Coolant capacity | 7.1 l (7.5 US qt | 6.25 UK qt) |
| Kerb Weight | 1392 kg (3068.83 lbs.) |
| Max. weight | 1860 kg (4100.6 lbs.) |
| Max load | 468 kg (1031.76 lbs.) |
| Trunk (boot) space – minimum | 385 l (13.6 cu. ft.) |
| Trunk (boot) space – maximum | 1247 l (44.04 cu. ft.) |
| Fuel tank capacity | 55 l (14.53 US gal | 12.1 UK gal) |
| Length | 4362 mm (171.73 in.) |
| Width | 1840 mm (72.44 in.) |
| Height | 1447 mm (56.97 in.) |
| Wheelbase | 2640 mm (103.94 in.) |
| Front track | 1535 mm (60.43 in.) |
| Rear track | 1531 mm (60.28 in.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Manual transmission |
| Front suspension | Spring Strut |
| Rear suspension | Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/40 R18 |
| Wheel rims size | 8J x 18 |
INTRODUCTION
The Ford Focus II ST 2.5i 20V, launched in 2005, was the performance-oriented version of the second-generation Focus. It built upon the solid foundation of the Mk2 Focus, known for its excellent handling, and elevated it with a more powerful engine and a host of chassis upgrades. Available in both 3-door and 5-door body styles, the ST aimed to provide a compelling alternative to established hot hatches like the Volkswagen Golf GTI and the Renault Mégane Sport. The HYDA engine was a key component, offering a substantial increase in power over the standard Focus engines.
Powertrain & Engine Architecture
At the heart of the Focus ST lies the 2.5-liter Duratec inline-five cylinder engine, designated HYDA. This engine, derived from Volvo’s modular engine family (Ford having owned Volvo at the time), was specifically tuned for performance. It featured a low-pressure turbocharger with an intercooler, multi-port fuel injection, and a double overhead camshaft (DOHC) valvetrain. The engine produced 225 horsepower at 6000 rpm and 320 Nm (236 lb-ft) of torque at a relatively low 1600 rpm. This broad torque curve provided strong acceleration throughout the rev range. The engine’s 9:1 compression ratio was a compromise between performance and reliability. The ST was exclusively offered with a 6-speed manual transmission, chosen for its durability and driver engagement. The gearbox featured relatively short ratios, contributing to the car’s responsive feel.
Driving Characteristics
The Focus ST 2.5i delivered a noticeably more spirited driving experience than its standard counterparts. The turbocharger provided a surge of power, making overtaking and quick acceleration effortless. The 6-speed manual transmission allowed drivers to keep the engine in its optimal power band. While not as brutally fast as some of its rivals, the ST offered a well-balanced and predictable driving experience. The suspension was significantly stiffer than the standard Focus, reducing body roll and improving handling. However, this came at the expense of some ride comfort. The steering was precise and well-weighted, providing good feedback to the driver. The front-wheel-drive layout, while capable, could exhibit some torque steer under hard acceleration.
Equipment & Trim Levels
The Focus ST came reasonably well-equipped as standard. Key features included sport seats with partial leather upholstery, air conditioning, alloy wheels (typically 18-inch), and a sport-tuned exhaust system. Optional extras included a sunroof, upgraded audio system, and parking sensors. The interior featured a unique instrument cluster with distinctive ST badging. The overall interior design was functional and sporty, though material quality was generally in line with other cars in its class. The ST trim level was the highest available on the Focus II, meaning it included features not found on lower-spec models.
Chassis & Braking
The Focus ST benefited from a revised chassis compared to the standard Focus. The suspension was lowered and stiffened, with thicker anti-roll bars to reduce body roll. The front suspension utilized MacPherson struts, while the rear featured a multi-link setup. The braking system was upgraded with larger ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) was standard. The ST’s suspension tuning prioritized handling and stability, making it a capable performer on twisty roads. The steering rack was also quicker than the standard Focus, further enhancing responsiveness.
Market Reception & Comparison
The Focus ST was generally well-received by automotive critics. It was praised for its engaging driving dynamics, strong engine performance, and practical hatchback body style. However, some reviewers noted that the interior lacked the premium feel of some of its rivals, such as the Golf GTI. Compared to the standard Focus, the ST offered a significant performance upgrade, but at the cost of some fuel economy and ride comfort. Against competitors like the Golf GTI, the ST often offered a more raw and visceral driving experience, while the GTI prioritized refinement and ease of use. The 1.6L and 1.8L petrol and diesel variants of the standard Focus offered significantly lower performance and were targeted at a more budget-conscious and fuel-economy-focused buyer.
Legacy
The Focus ST 2.5i 20V has become a popular choice among enthusiasts in the used car market. The Duratec engine is generally considered to be reliable, although regular maintenance is essential. Common issues include turbocharger wear and potential oil leaks. The 6-speed manual transmission is also robust, but clutch wear should be checked on older examples. Today, the Focus ST represents a compelling option for those seeking an affordable and engaging hot hatch. Its combination of performance, practicality, and relatively low running costs has ensured its continued popularity among driving enthusiasts. The HYDA engine, while not the most technologically advanced, has proven to be durable and capable when properly maintained.
