Stoewer PK4

Stoewer PK4
Illustration depicting the Stoewer PK4 as a Phaeton
Overview
Manufacturer	Stoewer
Production	1909–1910
Assembly	Stettin, Germany (now Szczecin, Poland)
Body and chassis
Class	Car
Powertrain
Engine	2.5-litre straight-4-cylinder ICE
Transmission	manual 3-speed
Chronology
Predecessor	Stoewer P2
Successor	Stoewer B2

Stoewer PK4 was convertible car manufactured in Stettin, Germany (now Szczecin, Poland) by Stoewer automotive company between 1909 and 1910. Other sources also suggest production until 1912. The vehicle was introduced almost ten years after the company was founded. It had a 2.5-litre internal combustion engine.

Specifications

Stoewer PK4 Front

Stoewer PK4 engine displacement 2545 cm³

The car was a multi-seater convertible with a 2.5-liter inline 4-cylinder internal combustion engine with a power output of 18 horsepower (13 kW) and a tax rating of 10 hp. Other sources also mention 11/20 hp. It had a manual three-speed transmission. Its top speed was 70 km/h (44 mph). It had a displacement of 2545 cm³ with a bore of 90 mm and a stroke of 100 mm. ^[1] The water cooling is assisted by a water pump driven by the camshaft. The cooling effect of the fin cooler is enhanced by a fan driven by a flat belt. Even the flywheel has spokes like a fan to expel the warm air from the engine compartment. The ignition occurs via a magnetic ignition. The gasoline supply is ensured through pressure via the exhaust system. This allows for a high-mounted carburetor. The oil pressure supply is already automated and only a sight glass is supposed to reassure the driver. The rear axle is driven by a drive shaft with only one joint. Body styles available include a double phaeton, a landaulet, or a delivery van version.

Bibliography

1. "Stoewer 10/18 HP (PK4)". Österreichische Fahrrad- und Automobil-Zeitung. 5 December 1909. Retrieved 26 August 2025.