Mini Cooper S

The Cooper S comes standard with a sport-tuned suspension, but its behavior is still much more refined than other cars capable of similar track speeds. Using the MacPherson strut front suspension and multi-link rear suspension adapted from the BMW Z4, the car is flat and stable in corners, and absorbs most bumps without discomforting passengers.

Though this model still has the same short wheelbase as its predecessor, and the same tight turning radius, BMW has retuned the suspension to reduce its oversteer potential so that even with radical changes in throttle or brakes in the middle of corners, the car never feels at risk of spinning out.

This feeling of composure has been heightened through the programming of the electromechanically assisted steering, which uses an electric motor, instead of hydraulics, to alter and enhance driver steering input. Because the steering is still mechanically connected to the front wheels, this system can't be called "drive-by-wire," and the driver still has a feel for the road and the car's changing cornering force can be felt through the wheel.

However, the system can alter the steering ratio and force required to make directional changes. This is most apparent in tight, slow parking lot maneuvers where very little effort or wheel motion is needed to make large changes in direction. In comparison, at highway speeds larger changes in the wheel result in smaller and less sensitive directional changes.

One advantage of electronically assisted steering is that input/output ratios can be changed during the course of a turn, not just varying with vehicle speed. In the Mini, this means that the initial turn-in is cushioned slightly, so the car doesn't feel as go-kart twitchy as the previous model, but once a constant turning radius is established, it takes almost no effort to maintain the turn, regardless of speed.