There are good reasons for the increasing use of alternative drive technology: Lower fuel consumption and emissions and the quiet operation speak for themselves. BOMAG is interested in discussing the pros and cons of new drive concepts and possible application scenarios with customers and interested parties at bauma, which is why they will be presenting two innovative drive solutions as prototypes for the lightweight BW 120 tandem roller for the first time. The electro-hydraulic drive with two powerful electric motors in the tandem roller impresses with its dynamically responsive top performance and minimum noise emissions. The future-proof version with an environmentally friendly gas engine boasts excellent energy efficiency and significantly reduced emissions, making the machine ideally equipped for current and future limit values in regulated markets. The electric tandem roller is powered by a high-performance battery pack; the gas version by a commercially available propellant gas cylinder, which, after a short briefing by staff, can be replaced easily and safely in 5-10 minutes. For ordinary applications, one LPG gas tank bottle is sufficient for approximately five operating hours. It is located where the diesel tank is usually sited.