Some things you just don't mess with too much. One of those is the Mini Cooper. Yes, this is an all-new Mini but, if it drove down a city street right now, 99 people out of 100 wouldn't know it. From a design perspective, the changes are subtle. But it is 4.5 inches longer and almost two inches wider. The base engine is a 134 horsepower turbocharged three-cylinder while the Cooper S gets a 189 horsepower turbocharged four-cylinder.