THE Mini Cooper is powered by a new 1598cc, single overhead camshaft, four-cylinder engine called Pentagon, which was developed by BMW with Chrysler. It delivers a healthy 85kW at 6000rpm and 149Nm of torque at 4500rpm, which is a figure closer to the class average. The engine runs on standard unleaded fuel, meets the EU4 emission requirements and at just 120kg is a light unit even though it uses a cast-iron block rather than all-alloy construction.