The MINI One D will be 20 per cent more powerful from September, increasing its power output by 13 bhp and knocking nearly two seconds off the 0-62mph sprint.

The stronger four-cylinder power unit has been thoroughly revised and offers improved performance yet offers the same economy as its predecessor. The combined fuel figure is 58.9mpg and this MINI can entertain its driver for 600 miles on one tank depending, of course, on his or her driving style.

The power hike is due to a revised engine management system and fuel injectors, as well as an exhaust gas re-circulation with a large-capacity catalytic converter. Torque has been increased by 10Nm to 190Nm and is now available between the engine speeds of 1800 and 3000 rpm. The top speed is 109mph, and the new engine naturally complies with EU4 emission standards.

The standard equipment list on all MINIs will get longer from the autumn. Single CD, radio boost and passenger airbag de-activation will be added to all models. White indicators will become standard on MINI Cooper S and MINI Cooper S Convertible.

A few changes to the extensive option list will take place in September too. Hyper blue metallic, previously only available on MINI Cooper S, will now be available across the range. The price for satellite navigation and Bluetooth telephone preparation will both be reduced by £210, to £1440 and £840 respectively.

The MINI range will receive its first model price increase since the model refresh in July 2004. An average two per cent increase will apply to the entire MINI range bar MINI One D, to which a 4.7 per cent increase will apply to reflect the more powerful new engine.

The MINI range starts from £10,995 on-the-road for the MINI One.