The Peugeot E1 is a 1,124 cc, inline‑four, naturally aspirated petrol engine produced between 1972 and 1985. It features a simple overhead valve (OHV) design with a single camshaft in the block, driven by a timing chain. Output is modest at 44 kW (60 PS) and 88 Nm of torque, prioritizing reliability and low-cost maintenance for compact city cars.
Fitted primarily to the Peugeot 104 and early 205 models, the E1 was engineered for economical, fuss-free urban motoring. Emissions compliance for its era was managed through basic carburetion and ignition timing, meeting pre-catalyst standards common before Euro regulations.
One documented design limitation is susceptibility to overheating under sustained high load, noted in Peugeot Technical Bulletin 7214. This is attributed to the engine's compact cooling jacket design and marginal radiator capacity in early 104 applications. Later 205 variants received minor cooling system upgrades to mitigate this.
Production years 1972–1985 pre-date formal Euro emissions standards (VCA UK Type Approval not applicable for pre-1992 vehicles).
The Peugeot E1 is a 1,124 cc inline‑four petrol engine engineered for compact city cars (1972-1985). It combines a robust cast-iron block with a simple OHV valvetrain to deliver dependable, low-cost performance. Designed for pre-catalyst emissions norms, it prioritizes mechanical simplicity and ease of repair over peak efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,124 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, OHV, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 66.0 mm × 82.0 mm | |
| Power output | 44 kW (60 PS) @ 5,500 rpm | |
| Torque | 88 Nm @ 3,500 rpm | |
| Fuel system | Single-barrel carburetor (Solex or Weber) | |
| Emissions standard | Pre-Euro (Basic) | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven | |
| Oil type | API SF/CC (SAE 15W‑40) | |
| Dry weight | 95 kg |
The OHV design offers excellent low-RPM torque for city driving but limits high-RPM power potential. The timing chain is generally durable but should be inspected for slack every 60,000 km. The simple carburetor requires periodic cleaning and adjustment; using ethanol-free petrol is recommended to prevent corrosion. The 9.0:1 compression ratio is tolerant of lower-octane fuels. Overheating in traffic or on hills is a known risk in early 104 models; ensure the radiator and thermostat are in good condition. Oil changes with 15W-40 mineral oil every 10,000 km are critical for longevity.
Oil Specs: Requires API SF/CC specification oil (Peugeot Service Manual 7214). Modern equivalents meeting API SL or higher are acceptable.
Emissions: Pre-dates formal Euro standards. Compliance was based on national regulations of the era (VCA Historical Vehicle Guidance).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across model range (Peugeot Group PT-1975).
Peugeot Technical Information System: Docs 7214, EPC 1124A
UK Vehicle Certification Agency Historical Vehicle Guidance
EEC Directive 80/1269 Power Measurement Standards
The Peugeot E1 was used across Peugeot's 104/205 platforms with transverse mounting. This engine received platform-specific adaptations-minor carburetor jetting and exhaust manifold routing-and no significant facelift revisions during its production run, ensuring broad interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the front face of the cylinder block, near the water pump (Peugeot Service Manual 7214). The designation "E1" will be clearly visible. Visually, it is identifiable by its tall, narrow profile, the single-barrel carburetor mounted centrally on the intake manifold, and the distributor positioned at the front of the engine. Critical differentiation from the larger X engine series: The E1 has a smaller bore (66mm vs 70mm+) and a visibly smaller carburetor. The oil filler cap is on the rocker cover, not the block.
The E1's primary reliability risk is cooling system failure, particularly in early 104 applications under heavy load. Peugeot service data indicates radiator and water pump issues are common after 100,000 km, while owner club surveys highlight carburetor wear as a frequent cause of drivability complaints. Infrequent oil changes accelerate bearing wear, making adherence to the maintenance schedule critical.
Analysis derived from Peugeot technical bulletins (1972-1985) and owner club maintenance records. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT E1.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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