Both the BA-64 and BA-64B were powered by a four-cylinder GAZ petrol engine developed 50 hp (37 kW) at 2,800 rpm.[3] The engine was particularly reliable and known for operating for extended periods even on low octane fuel and poor quality oil with minimal maintenance.[2] Under wartime conditions it was capable of providing good operational service up to 15,000 kilometres without needing major repair.[2] The BA-64 could be fitted with bullet-proof GK combat tyres, although these resulted in higher fuel consumption and reduced road speeds to 40 km/h.[2] Red Army mechanics typically fitted standard tires from the GAZ-M1 passenger car with civilian tread to the BA-64 for use in convoys, long-distance road marches, and rearguard duties.[2]