DRIVING ENGINE FOR VEHICLES

A driving engine for vehicles has at least two cylinders (2a, 2b) aligned with one another and engaged by respective pistons (7a, 7b) in a sliding manner, each of which is connected with a crankshaft (8) by means of the interposition of a connecting rod (10, 13), and is delimited by a free face (19) having a first width (L1), measured parallel to a rotation axis (9) of the crankshaft (8), smaller than a second width (L2) measured transverse to the first width (L1).