 All versions were four-cylinders with aluminium block, three-bearing crankshaft and wet liners, which were made in various bores to allow variety of displacements.Until 1987, all engines used iron cast five port cylinder head, after that year, 135 and 136 versions for Škoda and all subsequent variants used Aluminium eight port head.bore 68mm, stroke 68mm, compression ratio 8,3