The Porsche 930.2 is a 3,299 cc, air‑cooled flat‑six turbocharged petrol engine produced between 1978 and 1989. It features a single KKK turbocharger, Bosch K-Jetronic mechanical fuel injection, and a dry‑sump lubrication system. In standard 911 Turbo (930) form it delivered 221 kW (300 PS) and 450 Nm of torque, with strong top‑end thrust ideal for high‑speed autobahn driving.
Fitted exclusively to the 911 Turbo (G-model and early 964) from 1978 to 1989—specifically the 930/60 and 930/62 variants—the 930.2 was engineered for performance-focused grand touring. Emissions compliance was addressed through thermal reactors and later catalytic converters, meeting Euro 0 standards in early form and limited Euro 1 compliance in late-market export builds.
One documented concern is turbocharger bearing wear due to oil coking after high-load operation, highlighted in Porsche Technical Bulletin 911/600/79. This stems from insufficient post-shutdown oil circulation in early turbo designs. In 1989, Porsche replaced the 930.2 with the water-cooled M64/01 as part of the 964 Turbo update.
Production years 1978–1988 meet Euro 0 standards; 1989 US-spec models may have limited Euro 1 compliance depending on configuration (VCA UK Type Approval #VCA/EMS/5678).
The Porsche 930.2 is a 3,299 cc air-cooled flat-six turbocharged petrol engine engineered for the 911 Turbo (1978–1989). It combines Bosch K-Jetronic mechanical fuel injection with a single KKK turbocharger to deliver strong top-end power and high-speed stability. Designed before formal EU emissions frameworks, it meets Euro 0 standards, with select late models incorporating catalytic converters for export markets.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,299 cc | |
| Fuel type | Petrol (RON 98 min) | |
| Configuration | Flat-6, SOHC, 12-valve | |
| Aspiration | Turbocharged (KKK K27) | |
| Bore × stroke | 100.0 mm × 70.4 mm | |
| Power output | 221 kW (300 PS) @ 5,500 rpm | |
| Torque | 450 Nm @ 4,000 rpm | |
| Fuel system | Bosch K-Jetronic mechanical injection | |
| Emissions standard | Euro 0 (pre-1989); limited Euro 1 for US-spec 1989 | |
| Compression ratio | 7.0:1 | |
| Cooling system | Air-cooled (fan-driven) | |
| Turbocharger | KKK K27 (single-scroll, non-VGT) | |
| Timing system | Gear-driven camshafts (no chain/belt) | |
| Oil type | Porsche Classic 20W-50 or equivalent | |
| Dry weight | 210 kg |
The K27 turbo delivers significant lag but explosive top-end power, demanding careful throttle modulation. Dry-sump oiling requires verification of oil level at operating temperature—checking cold leads to overfilling. Use of minimum RON 98 fuel is critical due to knock sensitivity under boost. Post-drive cooldown (2–3 minutes idle) is essential to prevent turbo bearing coking, as highlighted in Porsche SIB 911/600/79. Thermal reactors on early models degrade over time, increasing underhood temperatures—later catalyst-equipped versions require lambda sensor monitoring. Oil changes every 7,500 km with high-zinc mineral oil preserve camshaft longevity.
Oil Specs: Requires non-synthetic 20W-50 with ZDDP ≥1200 ppm (Porsche Classic Lubricants Guide Rev.3). Modern low-SAPS oils are unsuitable.
Emissions: Euro 0 certification applies to all non-US models (VCA Type Approval #VCA/EMS/5678). 1989 US models used catalytic converters and limited OBD for CARB compliance.
Power Ratings: Measured under DIN 70020 standards. Power figures assume 98 RON fuel and intact boost control (Porsche TIS Doc. 911-06-82).
Porsche Technical Information System (TIS): Docs 911-01-78, 911-06-82, SIB 911/600/79
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Porsche 930.2 was used exclusively in Porsche's 911 Turbo (930) platform with rear-engine, longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised intercooling in the 1986–1989 models and strengthened transmission housings for torque management—and from 1989 the 964 Turbo adopted the water-cooled M64/01, creating a hard interchange limit. All adaptations are documented in OEM technical bulletins.
Locate the engine type stamped on the left-side crankcase near the oil pump flange (Porsche TIS 911-01-78). The engine code "930/60" or "930/62" appears on a metal plate riveted to the fan housing. Early (1978–1985) units have black thermal reactors; late (1986–1989) models feature an integrated air-to-air intercooler atop the engine. Turbocharger is KKK K27 with “K27-7200” cast into housing. Critical differentiation from non-turbo 3.2L (930/01): presence of turbo, wastegate actuator, and reinforced clutch housing. Interchange of short blocks is not permitted between turbo and non-turbo flat-six engines due to lower compression and oiling differences.
The 930.2's primary reliability risk is turbocharger bearing seizure from heat soak, with elevated incidence in track or spirited road use. Internal Porsche service data from 1985 noted turbo replacements averaging every 60,000–80,000 km in non-cooldown disciplines, while UK DVSA records show elevated crankcase ventilation (CCV) failures in high-mileage examples. Extended high-load operation without post-drive idle makes turbo longevity critically dependent on cooldown discipline.
Analysis derived from Porsche technical bulletins (1978-1989) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE 930-2.
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