Mini John Cooper Works Convertible
From Mini press: AA unique racing experience with 208 hp now also in the new generation of the open four-seater MINI – World debut at the International Geneva Motor Show – Extension of the wide range of John Cooper Works accessories for the MINI and the MINI Clubman. The new MINI Convertible simply begs the enthusiast to drive with the roof down – and now comes with particularly sporting and dynamic features all round.
The MINI John Cooper Works Convertible owes its outstandingly sporting character to the power machine within the engine compartment. Like the engine, numerous other components on the MINI John Cooper Works Convertible are derived directly from motorsport – for example the extra-light, exclusive light-alloy wheels, the extremely powerful brakes, a new exhaust system and the modified six-speed manual gearbox - all developed in close connection with the new racing car entered in the MINI CHALLENGE.
So it is fair to say that driving pleasure in the MINI John Cooper Works Convertible is influenced directly by significant contributions from motorsport. Even in its basic design and configuration, the 1,598-cc four-cylinder based on the power unit featured in the MINI Cooper S Convertible boasts significant technical features carried over from racing. The cylinder block and bearing case, for example, are made of aluminum, the four valves per cylinder are driven by two overhead camshafts, roller-type drag arms are optimized for minimum friction and hydraulic valve play compensation elements.
The exhaust valves, in turn, are filled with sodium to meet the greater cooling requirements of a turbocharged power unit. The increase in power over the engine featured in the MINI Cooper S Convertible is a result of the optimized supply and extraction of air, as well as the modified turbocharger. At the same time, all intake and exhaust components have been streamlined for optimum flow conditions, contributing to the special sound of the engine. Know-how gained from motorsport and detailed modifications for more power and performance. The flow of air through the pure air line leading to the turbocharger has also been increased and streamlined, with the twin-scroll turbocharger ensuring a particularly spontaneous build-up of power at all times.
The ducts of two cylinders at a time are separated from one another in the exhaust gas manifold and the turbocharger, ensuring that the turbine blades start to move in exactly the right way from low engine speeds. A turbine made of a particularly sophisticated material was developed especially for the engine of the John Cooper Works models, with maximum charge pressure increased from 0.9 to 1.3 bar. This serves to provide maximum torque of 192 lb-ft all the way from 1,850 to 5,600 rpm. And when accelerating, torque is briefly raised to an even higher level of 207 lb-ft by increasing charge pressure between 2,000 and 5,300 rpm.
This Overboost function gives the MINI John Cooper Works Convertible even more muscle and faster acceleration. Maximum output of 208 hp comes at 6,000 rpm, the spontaneous and direct response of the engine again providing even faster acceleration: The MINI John Cooper Works Convertible accelerates from a standstill to 60 mph in 6.6 seconds and has a top speed of 146 mph.