Porsche 912 1.7L Performance Engine | Type 616/40 | 1,720cc Big-Bore | Dellorto Carburetors | VW Adapter

This Porsche Type 616/40 flat-four engine was originally produced for a 1969 Porsche 912 and was rebuilt by the seller in 1992 to displace 1,720cc using a big-bore kit. After the rebuild, the engine was installed in a 1966 Volkswagen Microbus, where it accumulated approximately 22,000 miles before being removed in 1998 following damage to the vehicle. It has been in dry storage since.

During the rebuild, the factory crankshaft was retained, while the camshaft and bearings were replaced. The compression ratio was increased to 8.5:1, and the engine was fitted with Dellorto dual carburetors, a Bosch ignition coil, and a black-finished fan shroud. Additional equipment includes an exhaust system, distributor, cooling fan, and an aftermarket flywheel designed to mate the engine with a Volkswagen Type 1 transaxle. The engine case is plumbed for a full-flow oil filter kit, though the filter itself is not included.

Case stamping ☆4093113☆ confirms this is a Type 616/40 flat-four originally produced for a 1969 Porsche 912 destined for the U.S. or Canadian markets.

Technical Specifications

• Engine Type: 616/40

• Engine Number: ☆4093113☆

• Displacement: 1,720cc (rebuilt, up from factory 1,582cc)

• Configuration: Air-cooled flat-four (horizontally opposed)

• Bore x Stroke: Increased via big-bore kit (factory 82.5mm x 74mm)

• Compression Ratio: 8.5:1

• Carburetion: Dual Dellorto carburetors (installed 1992)

• Fuel System: Carbureted

• Ignition: Bosch coil and distributor

• Lubrication: Full-flow oil system (filter not included)

• Cooling: Air-cooled with belt-driven fan and black fan shroud

• Exhaust: Dual-outlet system (included)

• Flywheel: Aftermarket unit compatible with VW Type 1 transaxle

Condition & Rebuild History

• Rebuilt by: Seller (1992)

• Mileage after rebuild: ~22,000 miles

• Removed from vehicle: 1998

• Storage: Indoors since removal (not run since)

• Condition: Turns freely; offered as a running core for inspection and service prior to installation

Work Performed in 1992:

• Big-bore conversion to 1.7L

• Replacement camshaft and bearings

• Retained factory crankshaft

• Installed dual Dellorto carburetors

• Updated ignition components

• Added full-flow oiling system ports

Included Components

• Complete long-block engine

• Dual Dellorto carburetors

• Bosch ignition coil and distributor

• Cooling fan and black-finished fan shroud

• Exhaust system

• Aftermarket flywheel (for VW Type 1 compatibility)

• Full-flow oil system plumbing (filter not included)

Compatibility

• Original application: 1969 Porsche 912 (Type 616/40)

• Also suitable for: 1965–1969 Porsche 912 or Volkswagen conversions using a Type 1 transaxle

Ideal for use in Porsche 912 restorations, air-cooled VW swaps, or period-correct 1.7L performance builds.

This Type 616/40 flat-four was originally produced for a 1969 Porsche 912 and was rebuilt by the seller in 1992 to displace 1,720cc. The seller installed the engine in his 1966 Volkswagen Microbus and drove it for around 22k miles until snow slid off a building roof, damaging the bus. The engine was removed in 1998 and has been stored since.