Makes › Lancia › Delta › Delta S4 Stradale · Factory competition Extremely Rare
Lancia
Delta S4 Stradale
Twin-charged (supercharger + turbo) mid-engined 4WD Group B homologation road car.
Photo: Calreyn88 · CC BY-SA 4.0
Contents
01Overview
At a glance
- Built
- 200 Built
- Years
- Not yet verified
- Engine
- Supercharged and turbocharged four-cylinder · 1,800 cc / 1.8 LFactory: 1.8 L
- Power
- 184 kW / 250 PSFactory: 247 hp · converted
- Top speed
- Not yet verified
- Body
- Not yet verified
- Designer
- Not yet verified
- In this archive
- Not yet verified
- Surviving
- Not yet verified
Sources and any conflicting figures are in the sections below.
Why it matters
The Delta S4 Stradale is the road version of one of the most extreme Group B rally cars, with an engine that was both supercharged and turbocharged. It was also Lancia's first four-wheel-drive vehicle, and no more than 200 were built for homologation.
How rare is it?
Six separate kinds of rarity – never combined into one number.
Each kind of rarity is rated separately and never combined.
Photos
Exterior, interior and detail photos with their licences.
Lancia Delta S4 Stradale (Wikimedia Commons search)
Photo: Calreyn88 · CC BY-SA 4.0
Lancia Delta S4 Stradale (Wikimedia Commons search)
Photo: MrWalkr · CC BY-SA 4.0
Lancia Delta S4 Stradale (Wikimedia Commons search)
Photo: Calreyn88 · CC BY-SA 4.0
02Production & history
Production
Every figure says what it counts.
| What is counted | Figure | Basis | Status |
|---|---|---|---|
| Total model productionStradale road cars built ('Lancia built no more than 200') | 2001 | Factory production | Independently researched |
Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.
History
Developed jointly by Abarth and Lancia for Group B, the S4 used a 1.8-litre four-cylinder engine with both a supercharger and a turbocharger, developed under engineer Lombardi. Group B rules required a road version, and Lancia built no more than 200 Stradales. They were hard to sell, and some reportedly sat unsold in showrooms.
Variants
How each version differs from the standard Delta S4 Stradale.
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Not yet verified |
|---|---|
| Engine code | Not yet verified |
| Layout | Supercharged and turbocharged four-cylinder2 Independently researched |
| Displacement | 1,800 cc / 1.8 LFactory: 1.8 L2 Independently researched |
| Bore | 88.5 mmFactory: 88.5 mm3 Independently researched |
| Stroke | 71.5 mmFactory: 71.5 mm3 Independently researched |
| Compression ratio | Not yet verified |
| Valvetrain | DOHC4 Independently researched |
| Fuel system | Weber-Marelli IAW integrated electronic ignition and fuel injection3 Independently researched |
| Induction | Supercharger plus turbocharger2 Independently researched |
| Power | 184 kW / 250 PSFactory: 247 hp · converted3 Independently researchedHomologation-car figure. Potenziato-specification cars are quoted at 300 bhp (S1, S2). |
| Power at | 6,750 rpm3 Independently researched |
| Torque | 292 NmFactory: 215 lb-ft · converted3 Independently researched |
| Torque at | 4,500 rpm3 Independently researched |
Transmission & drivetrain
| Gearbox | Not yet verified |
|---|---|
| Gears | 53 Independently researched |
| Driven wheels | Four-wheel drive, viscous centre differential (30% front / 70% rear)2 Independently researched |
Chassis, body & dimensions
| Chassis | CroMoly steel tubular space frame reinforced with aluminium alloy3 Independently researched |
|---|---|
| Front suspension | Independent with coil-overs4 Independently researched |
| Rear suspension | Independent with coil-overs4 Independently researched |
| Brakes | 4-wheel ventilated discs4 Independently researched |
| Steering | Not yet verified |
| Body construction | Epoxy and fibreglass body panels3 Independently researched |
| Wheelbase | Not yet verified |
| Length | Not yet verified |
| Width | Not yet verified |
| Height | Not yet verified |
| Front track | Not yet verified |
| Rear track | Not yet verified |
| Kerb weight | Not yet verified |
| Dry weight | Not yet verified |
Performance
| Maximum speed | Not yet verified |
|---|---|
| 0–100 km/h | Not yet verified |
| Fuel tank | Not yet verified |
“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.
04Colours & options
Factory colours & interiors
Original paint and trim, with the number of cars in each where a source gives it.
Not yet documented. Have a source? Contribute it.
Factory options & codes
Codes are shown exactly as written by the manufacturer.
Not yet documented. Have a source? Contribute it.
05Individual cars
Chassis register
Every documented car, with its colours, history and where it is now. Open a row for the full record. Known chassis are not automatically authenticated originals.
Not yet documented. Have a source? Contribute it.
Competition history
Every race result of the individual cars, in date order. Click a chassis number to open its full record in the register.
Not yet documented. Have a source? Contribute it.
Auction & sale history
Documented public sales of the individual cars. Click a chassis number to open its full record in the register.
Not yet documented. Have a source? Contribute it.
See one in person
Museums where an example of this car can be seen.
No example is documented on public display yet. Have a source? Contribute it.
06Reference
Identification guide
How to tell an original from a replica or later conversion.
Stradale chassis numbers follow the pattern ZLA038AR0000000nn (for example ZLA038AR000000033). The homologation car has a CroMoly tubular space frame with epoxy and fibreglass panels, a mid-mounted 1,759 cc twin-charged engine and a 30/70 front/rear centre-differential split. Cars offered in Potenziato specification have an upgraded clutch, exhaust, wider rear wheels and tyres and an engine software update to 300 bhp, which the factory homologation cars did not have.
Sources
Each number links to the exact facts it supports.
-
1
1985 Lancia Delta S4 Stradale | Essen 2019 | RM Sotheby's Level B
- 200 Stradale road cars built ('Lancia built no more than 200')
-
2
1985 Lancia Delta S4 Stradale | Essen 2019 Level B RM Sotheby's
- both supercharged and turbocharged
- 1.8-litre four-cylinder
- viscous central differential ... 30% front and 70% rear
-
3
1985 Lancia Delta S4 Stradale (Bonhams catalogue text via Lot-Art) Level C Lot-Art
- 88.5mm bore x 71.5mm stroke
- Weber-Marelli IAW Integrated Electronic Ignition and Fuel Injection system
- conservatively calibrated to generate 247bhp at 6,750rpm
- 247bhp at 6,750rpm
- 215 lb-ft torque at 4,500rpm
- 5-speed transmission
- CroMoly steel tubular space frame, reinforced with aluminum alloy
- covered with epoxy and fiberglass body panels
-
4
1985 Lancia Delta S4 Stradale Level C Gooding & Company
- 1,759 CC DOHC Inline 4-Cylinder Engine
- 4-Wheel Independent Suspension with Coil-Overs
- 4-Wheel Ventilated Disc Brakes
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