THE LANCIA DELTA S4

Lancia Delta S4

1980 - 1991

The car's 1,759.3 cc four-cylinder engine combined supercharging and turbocharging to reduce turbo lag at low engine speeds. The car produced a maximum output of 480 horsepower (350 kW), but some sources even claim that the Delta S4 was capable of producing 500 horsepower (417 kW). In 1985, Lancia engineers tested an S4 engine under extreme conditions, reaching 5 bars boost, developing around 1000 horsepower. An engine capacity multiple of 1.4 was applied to forced induction engines by the FIA and the choice of 1,759 cc put the S4 in the under 2,500 cc class, which allowed for a minimum weight of 890 kg (1,962 lb). The combined super/turbocharger system (often referred to as twincharging) was a development of the 037 engine that produced 350 hp (261 kW) with a supercharger only.

The Lancia Delta S4 is a Group B rally car from the Italian car company Lancia. The Delta S4 competed in the World Rally Championship in 1985 and 1986, until Group B class was disbanded and the cars were eventually banned from competition completely by European sanctioning body FIA. The car replaced, and was an evolution of, the Lancia 037.

🏁 Lancia Delta S4 Replica UK | RallyReplica.co.uk

Hand-Built Lancia Delta S4 Replica UK — The Pinnacle of Group B Engineering

At RallyReplica.co.uk, we build authentic Lancia Delta S4 replicas in the UK, bringing one of the greatest Group B machines back to life.
Our expert craftsmen recreate the twin-charged power, four-wheel drive, and distinctive style that made this rally icon legendary.

The Story Behind the Delta S4

When Lancia launched the Delta S4 in 1985, it revolutionised rally design.
Its combination of turbocharger + supercharger produced blistering performance and instant response.
Our hand-built Delta S4 rally cars honour that heritage while meeting modern safety and reliability standards.

Lancia Delta home evo200

How We Build Our Delta S4 Replicas

Every vehicle is assembled in Britain using rally-grade components and precision fabrication.

Core features

  • Twin-charged engine delivering authentic Group B power

  • Four-wheel drive transmission

  • Lightweight composite bodywork

  • Tubular space-frame chassis

  • Optional Martini Racing or custom liveries

Your Options

  1. Turn-key builds — ready for road or track

  2. Chassis packages for experienced builders

  3. Show replicas for display and exhibitions

  4. Competition spec cars tested for motorsport use

Each Group B Lancia replica is tailored to your requirements — from finish and interior to drivetrain and decals.

Why Choose RallyReplica.co.uk

  • 🇬🇧 UK engineering excellence

  • 🧠 Built by Group B specialists

  • ⚙️ Modern reliability with authentic performance

  • 🧰 Bespoke options for display or racing

  • 💬 Personal service from consultation to delivery

Our Process

  1. Consultation → define your vision

  2. Design & specification → select components

  3. Fabrication & assembly → complete the build

  4. Testing & handover → road ready delivery

Contact us via the Contact Page or email info@rallyreplica.co.uk.

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Customer Feedback

“The Delta S4 replica from RallyReplica is a masterpiece — the sound and detail are identical to the original.”
— Paul T., Birmingham

“Incredible build quality and service. Feels like owning a real Group B car.”
— Neil S., Leeds

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Commission Your Lancia Delta S4 Replica Today

Experience Group B performance reborn with a custom-built Lancia Delta S4 Replica UK from RallyReplica.co.uk.
Start your journey toward owning a true rally legend.

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