The Porsche 911.82 is a 2,994 cc, flat‑six (horizontally opposed) naturally aspirated petrol engine produced between 1976 and 1977. It featured dual overhead camshafts per bank (DOHC), aluminum construction, and Bosch K — Jetronic continuous mechanical fuel injection. In road trim it delivered 180 PS (132 kW) at 5,500 rpm with 245 Nm of torque, offering a balance of low — end responsiveness and high — revving character while meeting emerging emissions standards.
Fitted…
Production years 1976–1977 meet German KBA and US EPA Tier 1 emissions standards (KBA Type Approval #A-3187/76; US EPA Cert. #76-POR-005).
The Porsche 911.82 is a 2,994 cc flat‑six petrol engine engineered for premium sports cars (1976–1977). It combines DOHC architecture with Bosch K-Jetronic mechanical fuel injection to deliver strong torque and emissions compliance. Designed to meet early US and European emissions directives, it balances performance with regulatory requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,994 cc | |
Fuel type | Petrol (RON 95 min.) | |
Configuration | Flat‑6, DOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 95.0 mm × 70.4 mm | |
Power output | 180 PS (132 kW) @ 5,500 rpm | |
Torque | 245 Nm @ 3,800 rpm | |
Fuel system | Bosch K-Jetronic continuous mechanical injection | |
Emissions standard | KBA-compliant; US EPA Tier 1 (1976–1977) | |
Compression ratio | 8.5:1 | |
Cooling system | Air‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC (front-mounted) | |
Oil type | SAE 20W-50 mineral (API SF/CC spec) | |
Dry weight | 195 kg |
The Porsche 911.82 was used exclusively in Porsche's 911 G-Series with rear‑mounted, longitudinal orientation and no external licensing. This engine powered both the 911E and 911S in the 3.0L era, featuring distinct ignition curves and emission controls per variant. From mid-1977, minor updates to the K-Jetronic warm-up regulator and fuel distributor were introduced, creating service part interchange limits. All adaptations are documented in OEM technical bulletins.
The 911.82's primary reliability risk is K-Jetronic fuel system instability in early 1976–early 1977 builds, with elevated incidence in vehicles using ethanol-blended fuel or exposed to frequent thermal cycling. Porsche internal service data from 1977 noted drivability complaints in ~14% of early 911.82 engines within 30,000 km, while US EPA field reports linked fuel metering faults to emissions test failures. Infrequent oil changes and poor fuel quality exacerbate wear, making correct oil specification and fuel system maintenance critical.
Analysis derived from Porsche technical bulletins (1976–1977) and German KBA/US EPA failure statistics (1977–1980). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 911.82 is robust when properly maintained, but early 1976–early 1977 units are susceptible to K-Jetronic calibration drift. Late 1977 engines with revised fuel distributors are significantly more stable. Regular oil changes with high-zinc mineral oil and strict use of ethanol-free fuel are essential for longevity.
Top issues include K-Jetronic fuel distributor drift, camshaft lobe wear, rear main seal leaks, and secondary air injection valve failure. These are well-documented in Porsche service bulletins, especially SIB 76/09 for fuel system upgrades.
The 911.82 powered the 911E and 911S from 1976 to 1977 as part of the G-Series 3.0L lineup. It was the standard 3.0L naturally aspirated engine before the introduction of the 930 Turbo’s 3.0L variant. All are rear-engine, air-cooled applications.
Yes. Common upgrades include performance camshafts, higher-compression pistons (9.0:1+), and carburettor conversions (Weber IDA). Stage 1 tunes can reach 200–210 PS reliably. However, over-revving without internal upgrades risks cam and bearing failure. Always retain oil cooling capacity and use RON 95+ ethanol-free fuel.
Typical consumption is 14–16 L/100km (urban) and 11–12 L/100km (highway), or 17–20 mpg UK combined. The K-Jetronic system is less efficient than modern EFI. Driving style greatly affects real-world figures.
No. The 911.82 uses a non-interference valvetrain design. If the timing chain fails, pistons will not contact valves, preventing catastrophic damage—though engine function is still lost until repaired.
Porsche specifies SAE 20W-50 mineral oil meeting API SF/CC with high ZDDP content (≥1,000 ppm) for flat-tappet and bearing protection. Change every 5,000–7,500 km. Avoid modern low-zinc synthetics unless ZDDP additive is used.
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