The RVA is the new VORTEX engine for the ICA and FA classes; it comes from the experience and from the successes of the VLB/W model just being an engine completely new. The principle innovation lies in the cylinder, with new exhaust ports and transfer ducts and with a new reported liner. The water cooling chamber is completely different, in the shape and in the volumes, in order to obtain a better cooling in the parts thermicaly more stressed and a more constant inner temperature. The head fixing is now separate from that of the cylinder, improving the seal and permitting more linear expansions. The head itself is totally new, in the shape, in the characteristics of the combustion chamber and in the characteristics of the water chamber. The new crankcase sees increased its own characteristics of strength, and has been extended its surface of thermal exchange in order to obtain a good cooling. All of this has taken to a considerable performance increase, and it constitutes a good starting basis for the continuous development to which will be submitted the engine race from race.