they are roughly 1/32-1/34, but then again since they arent based of real cars (but a mashup of different brands), a definitive scale will never be available... However, if you compare them to the main design reference (like Universe Sunstreaker as a Lambo), the size also varies. For example, Sunstreaker is smaller to the 1:32 Roadbot Lambo, but Prowl is pretty much the same size of Alternity Megatron
