Without doubt the most outstanding feature of the 4L is its behaviour on very poorly surfaced roads and cross-country tracks. It is almost impossible to make the suspension bottom out, and the car can be driven at incredible speed over severe undulations and through deep potholes with the passengers comfortable and the driver in full control. As might be suspected, it has its shortcomings for normal road use. In a straight line the car’s progress consists of a slightly rolling gait, reminiscent of a shore-bound sailor. When cornering a moderate amount of enthusiasm only is enough to lift the inside front wheel sufficiently to allow it to spin, however, adhesion is – on the whole – good.Handling is not a prime consideration. As might reasonably be expected, the 4L understeers under power, though this can be checked by closing the throttle. The rack and pinion steering can best be put down as lumpy.Performance is leisurely: the 747cc unit propels the 4L to 30mph in 9.9sec and 40 in 18.4sec, and it could not be persuaded to exceed 56mph on a level road.The fascia-mounted push-pull gearlever is ideally sited for fast changes between second and top. Top gear is ideal for cruising – although the ratio is so high that there is little acceleration available – and the engine is happy enough to travel long distances near flat-out.The brakes – drums all round – are progressive and light, and extremely well matched to the car’s performance.