From SCDimensions

Motor Details
Motor Manufacturer	SCX	+
Motor Model	RX-42B	+
Motor Voltage - Rated	12 vdc	+
Motor Voltage - Tested	12 vdc	+
Motor RPM - Rated	18000 rpm	+
Motor RPM - Tested	18081 rpm	+
Motor Torque - Rated	153 gm/cm0.015 N-m	+
Motor Torque - Tested	97 gm/cm0.00951 N-m	+
Motor Watts - Rated	6.9 watts0.00925 hp	+
Motor Watts - Tested	4.4 watts0.0059 hp	+
Motor Amperes - Rated	0.6 amps	+
Motor Amperes - Tested	0.4 amps	+

As of 2009, the RX-42B is the standard motor in most SCX Digital and Analog cars.