Porsche 912 Type 616/40 Engine – 1,720cc Flat-Four – Big-Bore – Engine Number ☆4093113☆

This Porsche Type 616/40 flat-four engine is a versatile and upgraded powerplant originally produced for a 1969 Porsche 912. Rebuilt by the seller in 1992 and enlarged to 1,720cc, this engine blends period-correct Porsche engineering with practical performance enhancements, making it suitable for classic Porsche restorations, vintage Volkswagen conversions, or enthusiast projects.

Following the rebuild, the engine was installed in the seller’s 1966 Volkswagen Microbus, where it covered approximately 22,000 miles before the vehicle was damaged by a structural incident. The engine was removed in 1998 and has been stored since, preserving it as a well-documented, lightly used performance build rather than a high-mileage core. The engine case stamping ☆4093113☆ confirms authenticity as a Type 616/40 unit originally destined for a 1969 Porsche 912.

Specifications

• Engine Type: Porsche Type 616/40 flat-four

• Configuration: Air-cooled, horizontally opposed four-cylinder

• Original Application: 1969 Porsche 912

• Displacement: 1,720cc (big-bore conversion)

• Compression Ratio: 8.5:1

• Engine Number: ☆4093113☆ (correct for 1969 912)

• Crankshaft: Original factory crankshaft retained

• Camshaft: Replaced during rebuild

• Bearings: Replaced during rebuild

• Carburetors: Dellorto (installed during rebuild)

• Ignition: Bosch ignition coil and distributor

• Cooling: Cooling fan with black-finished fan shroud

• Exhaust: Fitted exhaust system

• Flywheel: Aftermarket flywheel allowing use with Volkswagen Type 1 transaxle

• Oil System: Plumbed for full-flow oil filter (filter not included)

Condition & History

• Rebuilt in 1992 with performance-oriented upgrades

• Approximately 22,000 miles driven post-rebuild

• Removed from service in 1998 and stored since

• Not recently run or tested

• Offered as a recommissioning candidate or enthusiast engine

• Ideal for inspection, resealing, and light refreshing before use

Ideal Applications

• Porsche 912 restoration or upgrade

• Vintage Volkswagen conversions (Type 1 transaxle compatible)

• Classic air-cooled performance builds

• Enthusiast projects seeking Porsche reliability with added displacement

Why This Engine Matters

• Authentic Type 616/40 Porsche engine case

• Desirable 1,720cc big-bore conversion for improved torque and drivability

• Retains factory crankshaft for durability

• Compatible with both Porsche and Volkswagen applications

• Documented history and long-term ownership

This Porsche 912 Type 616/40 1,720cc flat-four engine offers a unique blend of Porsche heritage and practical performance upgrades, making it a compelling option for restorers, builders, and air-cooled enthusiasts worldwide.