The "Mk I" MINI One, Cooper and Cooper S use a Brazillian built Tritec engine while the MINI One D uses a Toyota built diesel engine
The "Mk II" MINI that was launched earlier this year is powered by a new 1.6 litre engine co-developed by BMW and PSA group. The engine is named Prince. The Cooper S mini uses a 1.6 turbo that is share with the Peugeot 207 rather than the previous 1.6 supercharged engine.