Abstract: A telescopic piston and crankshaft assembly includes a crankshaft that has a plurality of rod journals. Each of the rod journals has a center portion and a pair of lateral portions. The center portion is offset from each of the lateral portions with respect to an axis of rotation extending through the crankshaft. The center portion leads the lateral portions when the crankshaft is rotated. A plurality of piston units is each rotatably coupled to the crankshaft. Each of the piston units has an outer section and an inner section. The outer section of each of the piston units is rotatably coupled to each of the lateral portions of an associated one of the rod journals. The inner section of the piston units is rotatably coupled to the center portion of an associated one of the rod journals. The inner section leads the outer section when the crankshaft rotates.