2009 Mini Cooper John Cooper Works 2009 : The Works engines from Hams Hall also come with reinforced, specially polished pistons, as well as a strengthened cylinder head for optimised stability and a modified cylinder gasket. The intake valves and valve seat rings have also been upgraded with stronger and more resistant materials. This reduces the engine's compression ratio. Expected prices on-the-road are £20,500 for the MINI Cooper John Cooper Works and £21,700 for the MINI Clubman John Cooper Works.
