BMW R 4 Series 3

The 1934 BMW R 4 Series 3 represents a significant chapter in BMW's early motorcycle development, building upon the R 4's initial introduction in 1932. This iteration solidified BMW's reputation for robust and reliable machines in the pre-war era. During its time, it faced direct competition from models like the DKW SB 350 and various offerings from Triumph and Norton, all vying for market share among riders seeking practical and durable transportation. The R 4 Series 3 was designed to be a workhorse, capable of handling the diverse demands of the period, from civilian use to more demanding military applications.

Powering the R 4 Series 3 was a single-cylinder, four-stroke engine with a displacement of 398.0 ccm (24.29 cubic inches). This robust powerplant was designed for durability and consistent output, allowing the motorcycle to achieve a respectable top speed of 100.0 km/h (62.1 mph). Fuel capacity was set at 12.00 litres (3.17 US gallons), providing a practical range for touring and daily use. While not built for outright speed, the engine delivered dependable power, crucial for the era's infrastructure and road conditions. Its shaft drive system, a BMW hallmark, contributed to its reputation for reliability and low maintenance.

Riding the R 4 Series 3 would have been characterized by its straightforward and functional design. The motorcycle featured a relatively upright riding position, conducive to long-distance comfort and good visibility. Its sturdy chassis and suspension, while basic by modern standards, were engineered to cope with unpaved roads and varied terrain. The overall feel would have been one of solidity and predictability, rather than agility. The single-cylinder engine, while providing adequate power, would have delivered a distinct thumping rhythm, a characteristic sound of early motorcycles.

The BMW R 4 Series 3 was primarily aimed at a practical-minded audience, including government agencies, police forces, and civilians who required a dependable and durable mode of transport. Its robust construction and ease of maintenance made it an attractive option for those needing a reliable workhorse rather than a sporting machine. Today, it remains a fascinating piece of motorcycle history, embodying BMW's early engineering principles and its commitment to building dependable machines that could withstand the rigors of the road.