This is a GCLaser 292-1209 HO Scale Country Market - Kit (Laser-Cut Wood) 3-1/16 x 3-3/8 x 1-11/16 A great detail for modern layouts

all 4 driving axles powered in each unit

Here is a MTH 20-20030-3 Electro Motive Division SD-9043MAC Dummy Diesel Engine

but smoother running

Model Number: 20-41001

MTH 20-20466-1 O Long Island G.E. 44 Ton Diesel Engine w/ P-S 3.0 #400 (Hi-Rail) ProductID_12272696 This is a GCLaser 292-1209This is an MTH 20 20466 1 O Long Island G. E. 44 Ton Diesel Engine with Proto Sound 3. 0 (Hi Rail Wheels) #400. This features Intricately Detailed Diecast Body, Diecast Truck Sides, Pilots and Fuel Tank, Metal Chassis, Metal Handrails and Decorative Horn, Authentic Paint Scheme, Metal Wheels, Axles and Gears, Kadee Compatible Coupler Mounting Pads, (2) Remote Controlled Proto Couplers, Prototypical Rule 17 Lighting, Directionally Controlled Constant