The BOMAG BW 120 AD-4 is a compact, articulated tandem vibratory roller designed for efficient asphalt and soil compaction in confined and urban environments. It features two smooth drums with a 47.3-inch drum width and 27.6-inch diameter, providing a static linear load of 60.5 lb/in for consistent, high-quality surface finish. The machine is powered by a Kubota D 1703 MDI 3-cylinder diesel engine delivering 34.3 hp at 2700 rpm, ensuring reliable performance with low fuel consumption. With an operating weight of 5732 lb and a compact overall length of 8.2 ft, the BW 120 AD-4 offers excellent maneuverability and a tight inner turning radius of 103.1 in, ideal for working in tight spaces. It delivers dual vibration frequencies of 3300 vpm (55 Hz) and 4200 vpm (70 Hz), with a medium amplitude of 0.1 in and a centrifugal force of 6294.7 lb per drum, enabling effective compaction across various lift thicknesses. The hydrostatic drive system provides infinitely variable speed control up to 7.5 mph, while the oscillating articulation joint ensures both drums follow the same path for uniform compaction. Standard features include a pressurized water spray system, isolated operator platform, ROPS, and a 10.6-gallon fuel tank, making it a durable, operator-friendly solution for asphalt finishing, patching, and light soil work.