The Peugeot 1580 SPI is a 1,580 cc, inline‑four petrol engine produced between 1986 and 1992. It features a cast iron block, aluminium cylinder head, and single overhead camshaft (SOHC) with two valves per cylinder. In standard form, it delivered approximately 55 kW (75 PS), balancing urban drivability with modest highway performance.
Fitted primarily to the Peugeot 309 and 405, the 1580 SPI was engineered for dependable, cost — effective motoring. It offered adequate t…
All production years (1986–1992) meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/4891).
The Peugeot 1580 SPI is a 1,580 cc inline‑four petrol engine engineered for compact family applications (1986-1992). It combines a simple SOHC 8-valve design with single-point fuel injection to deliver predictable performance and low running costs. Designed to meet Euro 1 standards, it prioritizes mechanical simplicity and ease of service.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,580 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 78.5 mm × 82.0 mm | |
Power output | 55 kW (75 PS) @ 5,600 rpm | |
Torque | 120 Nm @ 3,000 rpm | |
Fuel system | Bosch Mono-Jetronic | |
Emissions standard | Euro 1 | |
Compression ratio | 9.4:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven camshaft | |
Oil type | SAE 10W-40 (API SG/CD) | |
Dry weight | 98 kg |
The Peugeot 1580 SPI was used across Peugeot's 309/405 platforms with transverse mounting. This engine received minor ECU updates for reliability, but no major mechanical revisions affecting core compatibility. All adaptations are documented in OEM technical bulletins.
The 1580 SPI's primary reliability risk is timing belt failure due to neglected service intervals. Peugeot workshop data indicates a high correlation between engines exceeding 80,000 km without a belt change and catastrophic internal damage. Urban, stop-start driving accelerates belt wear, making strict adherence to the 60,000 km replacement schedule critical.
Analysis derived from Peugeot technical bulletins (1986-1992) and UK DVSA failure statistics (1992-2002). Repair procedures should follow manufacturer guidelines.
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The 1580 SPI is renowned for its mechanical simplicity and potential for long life, often exceeding 200,000 km. Its main vulnerabilities are the timing belt and ignition components; failure to replace the belt at 60,000 km or ignoring distributor wear can lead to expensive failures. With proper maintenance, it is an exceptionally robust and reliable engine.
The most critical issue is timing belt and tensioner failure. Other common problems include worn distributor rotor arms causing misfires, coolant leaks from aging plastic thermostat housings, and erratic idle caused by a dirty throttle body or faulty idle control valve. These are well-documented in Peugeot service literature.
The 1580 SPI was the primary 1.6L petrol engine for the Peugeot 309 (1986-1991) and 405 (1987-1992). It was also used briefly in the early Citroën ZX (1991-1992). It was not used in smaller models like the 205 or larger models like the 605, which used different engine families.
Yes, but gains are modest. Common modifications include a performance exhaust, air filter, and carburetor conversion, yielding around 5-10 additional PS. More significant power requires internal modifications. Its robust bottom end can handle moderate increases, but the head and valvetrain are significant bottlenecks for high performance.
Good for its era. In a Peugeot 405, expect real-world figures of approximately 8.0 L/100km (city) and 6.0 L/100km (highway), translating to roughly 35 mpg UK (combined). Its design prioritizes reliability over ultimate efficiency.
Yes. The 1580 SPI is an interference engine. If the timing belt breaks or jumps teeth, the pistons will collide with the open valves, resulting in bent valves, damaged pistons, and potentially a ruined cylinder head. This makes the 60,000 km belt change interval absolutely non-negotiable.
Peugeot recommends a good quality mineral or semi-synthetic 10W-40 engine oil meeting API SG/CD or ACEA A2/B2 specifications. Full synthetic is not necessary and offers no significant benefit for this engine. Change the oil and filter every 10,000 km or annually.
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Regulation (EC) No 715/2007
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