This 1958 Porsche AP18 tractor was produced after Porsche’s tractor division and German tractor manufacturer Allgaier were purchased by Mannesmann AG. The AP18 is based on Allgaier’s earlier AP16 tractor, albeit with a more powerful air-cooled diesel two-cylinder taken from the larger AP22 tractor. The transmission is a 5-speed manual with a dogleg first gear built by ZF. The previous owner was a Porsche tractor collector who reportedly never used this example, and the selling dealer estimates that the current owner has added approximately 20 hours during his two years of ownership. This AP18 was last serviced four months ago and is now being offered on a bill of sale.

The seller believes that the tractor was partially restored in the 1980s and notes that some non-standard pinstriping is present. Tires are said to appear newer front and rear, and the rear wheels can be braked individually. The rear axle is the portal type for increased ground clearance, and is equipped with a locking differential.

The tractor does not have a hydraulic system, though it is equipped with dual PTO outputs for running implements.

The lighting works intermittently, and the left headlight lens is cracked. The “1” in AP18 on the right side of the hood is incorrect, and the letter “C” in Porsche on the right side has been repaired.

A cylinder head temperature gauge is the only instrument. The seller estimates that the current owner has added about 20 hours over two years of ownership, though the true total is unknown as no hour meter is present. The seat has been repaired, and per the seller the repair is older and appears very strong.

The AP18 is based on the preceding AP16 tractor, but with the larger air-cooled 1.5-liter two-cylinder diesel from the AP22. The engine is restricted slightly compared to the AP22 and produces 18 horsepower rather than 22. The engine is coupled to a ZF 5-speed manual transmission with a dogleg first gear. The clutch adjuster has been shimmed, and the shim can be seen in the gallery.

The last service was performed four months ago and consisted of adding fresh fluids throughout. Some leaks are noted by the seller.

The tractor is said to start easily and run as it should. All gears on the 5-speed manual gearbox are reported to engage. A walkaround and drive video is attached below.