Ford Fiesta RS Turbo: A 90s Hot Hatch Icon

The Ford Fiesta has a storied history, evolving from a nimble city car to a genuine road rocket over its 40-plus years of production. While many iterations have graced the roads, few have captured the hearts of performance car enthusiasts quite like the Ford Fiesta RS Turbo. This 1990s icon, a potent evolution of the XR2i, offered a thrilling blend of accessible power and engaging handling that cemented its status as a true hot hatch legend. In this comprehensive guide, we delve into the world of the Mk3 Fiesta RS Turbo, exploring its origins, what to look for when buying one, its considerable tuning potential, and its enduring appeal.

The Genesis: From XR2i to RS Turbo

Following the mildly disappointing Mk3 Fiesta XR2i, Ford sought to inject serious performance into its supermini. The answer was the Fiesta RS Turbo, a car that took the established formula and amplified it. Based on the Mk3 Fiesta shell, the RS Turbo received a significant mechanical overhaul. The key ingredient was the turbocharged 1.6-litre CVH engine, derived from its XR2i predecessor but significantly enhanced with the addition of a Garrett T02 turbocharger and an intercooler. This potent combination, managed by Ford's EEC-IV system, unleashed a formidable 133bhp and 135lb.ft of torque. This was a substantial leap forward, transforming the Fiesta from a brisk performer into a genuine pocket rocket, capable of a 0-60mph sprint in a brisk 7.9 seconds and reaching a top speed of 129mph.

Visually, the RS Turbo distinguished itself with a more aggressive stance. It featured body-coloured bumpers, pronounced wheelarch extensions, side skirts, and a distinctive tailgate spoiler. The bonnet louvres were a clear indicator of the enhanced performance lurking beneath, hinting at the power delivered by the turbocharged engine. Inside, the RS Turbo offered a more sporting cabin, often featuring Recaro front seats for enhanced support during spirited driving, along with a leather-clad steering wheel and gearknob.

Buying a Mk3 Ford Fiesta RS Turbo: What to Look For

As with any performance car from the 1990s, buying a Mk3 Fiesta RS Turbo requires a discerning eye. These cars have a reputation for succumbing to the elements, and rust is the primary enemy. Diligent inspection is paramount. Key areas to scrutinise include:

• Bulkhead and Battery Tray: These areas are notorious for collecting moisture and can suffer significant corrosion.
• Door Pillars and Floorpan: Check the A-pillars, B-pillars, and the entire floorpan, including the footwells, for any signs of bubbling paint or structural weakness.
• Sills: Both inner and outer sills are highly susceptible to rust.
• Rear Wheelarches: Inspect the rear arches thoroughly, both inside and out, for corrosion.
• Fuel Filler Cap Area: This is another common spot for rust to take hold.
• Windscreen Base: The area where the windscreen meets the bodywork can trap water and corrode.
• Tailgate: Check the lower sections of the tailgate for rust.

Beyond the bodywork, pay close attention to the mechanicals. Listen for any untoward noises from the engine, such as knocking (which could indicate worn cam or crank bearings) or blue exhaust smoke (suggesting worn valve stem seals, piston rings, or turbocharger issues). White smoke or a milky residue in the oil or coolant points towards a failed head gasket. The transmission can also be a point of concern. A notchy or vague gear change could be due to worn linkages, but more serious issues like clutch slip, gearbox whine, or crunching synchros will require expensive repairs. Always ensure the chassis number matches the VIN tag and the V5 registration document to confirm you are buying a genuine RS Turbo and not a modified XR2i.

Tuning the Mk3 Ford Fiesta RS Turbo: Unleashing More Power

The Mk3 Fiesta RS Turbo is a highly tuneable machine, offering significant scope for increased performance. The inherent strength of the CVH engine, coupled with the turbocharger, provides a solid foundation for modifications.

Stage 1 Tuning:

For a modest power increase, basic modifications are highly effective. These include:

• Uprated Exhaust System: A free-flowing exhaust system can improve gas flow and release more power.
• Performance Air Filter: A less restrictive air filter can aid engine breathing.
• Uprated Injectors: Larger fuel injectors are often necessary to supply adequate fuel for increased boost pressure.
• Performance Chip: A remapped ECU or a performance chip can optimise fuel and ignition timing for better performance.

These modifications, often combined with an increase in boost pressure via a 2.5 Bar map sensor and custom mapping, can yield around 160-180bhp. However, it's crucial to ensure the fuel system can cope.

Stage 2 Tuning and Beyond:

For more significant power gains, more extensive modifications are required:

• Uprated Camshaft and Solid Lifters: These can improve valve timing and lift, further enhancing performance.
• Larger Intercooler: A more efficient intercooler will ensure a cooler, denser air charge for the engine, reducing the risk of detonation and increasing power.
• T3 Turbocharger: Swapping the standard T02 turbo for a larger T3 unit offers greater airflow potential.

With these upgrades, an RS Turbo can comfortably produce 220bhp on standard internals. Pushing further, fitting a forged bottom end and a larger T34 turbocharger can lead to 300bhp. However, the standard CVH cylinder block is known to be a weak point at these power levels. For ultimate reliability and power, many enthusiasts opt for engine conversions:

• ZVH Conversion: This involves combining a Zetec cylinder head with the CVH block, offering improved breathing while retaining some of the CVH's mechanicals.
• Full Zetec Conversion: Swapping to a complete Zetec engine, often from a Focus or Puma, provides a more modern and robust platform for high power outputs. With appropriate internal upgrades and turbocharging, 500bhp is achievable with a Zetec conversion.

Transmission and Drivetrain Upgrades

The standard Fiesta RS Turbo gearbox, while adequate for stock power, will struggle with significantly increased outputs. The lack of a limited-slip differential (LSD) from the factory also hampers traction. For cars producing over 200bhp, an LSD is a highly recommended upgrade. Options include:

• Quaife ATB Differential: A popular and highly effective aftermarket solution.
• RS Turbo Series Two Differential: If using an Escort RS Turbo gearbox, the viscous LSD can be fitted.

A stronger clutch is also essential when increasing power. An AP or Helix four-paddle clutch is a common choice for cars making over 200bhp. For ultimate gearbox strength, consider an IB5 or the MTX75 from a Mk5 RS2000.

Braking and Suspension Enhancements

To match the increased power, significant upgrades to the braking and suspension systems are crucial for safety and handling.

Braking Upgrades:

The standard brakes are often considered a limiting factor. Popular upgrades include:

• Cosworth 4x4 or Fiesta ST150 Front Brakes: These offer a significant improvement and typically fit behind 15-inch wheels.
• Focus ST170 Brakes: The 300mm discs and calipers from the Focus ST170 are an excellent option, usually requiring 16-inch wheels.
• Focus RS Mk1 Brembo Calipers: For serious stopping power, these can be fitted behind standard 17-inch alloys.

Suspension Upgrades:

Improving the Fiesta's handling is relatively straightforward:

• Polyurethane Bushes: Replacing standard rubber bushes with polyurethane units tightens up the chassis and improves steering response.
• Lowered Springs and Uprated Dampers: A common modification for a more aggressive stance and improved body control.
• Coilovers: For adjustable ride height and damping, coilovers are the ideal solution, especially for track day use.
• Strut Braces: Front and rear strut braces can further enhance chassis rigidity.
• Rear Anti-Roll Bars: The RS Turbo featured anti-roll bars, but aftermarket options can offer further refinement of handling characteristics.

The Fiesta RS Turbo in Context: A Look at its Peers

The Mk3 Fiesta RS Turbo arrived in a golden era for hot hatches. It competed against formidable rivals such as the Peugeot 205 GTI, Volkswagen Golf GTI, and the Ford Escort XR3i. While the 205 GTI was often lauded for its sublime handling and the Golf GTI for its refinement, the Fiesta RS Turbo offered a raw, turbocharged punch that was incredibly compelling. Its affordability and accessible tuning potential also made it a favourite among younger enthusiasts and those looking to build a highly competitive track car.

Compared to its predecessors:

Frequently Asked Questions

Is the Ford Fiesta RS Turbo a good investment?

Genuine, well-maintained Mk3 Fiesta RS Turbos are becoming increasingly rare and sought after by collectors and enthusiasts. While not a classic investment in the same vein as some other performance Fords, their values are steadily appreciating, especially for original, unmodified examples. Cars that have been tastefully modified and are in excellent condition also hold their value well.

What are the common problems with a Mk3 Fiesta RS Turbo?

The most significant issue is rust, affecting the sills, bulkhead, wheelarches, and floorpan. Mechanical issues can include worn engine bearings, head gasket failure, and gearbox synchro wear. It's also important to check for the correct VIN and chassis numbers to ensure authenticity.

How much power can a Mk3 Fiesta RS Turbo make?

With basic bolt-on modifications and increased boost, around 180bhp is achievable. With more significant upgrades like a larger turbo, forged internals, and engine management, 250-300bhp is readily attainable. Engine conversions, such as a Zetec turbo, can push power figures well over 400bhp.

Does a 1990 Fiesta RS Turbo need to be replaced?

A 1990 Fiesta RS Turbo does not necessarily need to be replaced if it is in good condition. However, as noted in the provided information, issues like a weeping clutch master cylinder may require attention. If the car is largely original, free from significant welding, and has only reversible modifications, it represents a smart example of a 90s hot hatch and is certainly worth preserving or restoring rather than replacing.

Conclusion

The Ford Fiesta RS Turbo stands as a testament to Ford's ability to create exciting and engaging performance cars. It bridged the gap between the more humble XR models and the later, more sophisticated ST variants. Its turbocharged heart, aggressive styling, and remarkable tuning potential have ensured its place in Ford's performance heritage. For those seeking a slice of 90s hot hatch nostalgia with the added thrill of turbocharged acceleration and a platform ripe for modification, the Mk3 Fiesta RS Turbo remains an undeniably compelling choice.