Lamborghini Countach LP500S
LP 400S / LP 500S
In 1978, a new LP 400S model was introduced. Though the engine was slightly downgraded from the LP 400 model (355 PS), the most radical changes were in the exterior, where the tires were replaced with much wider Pirelli P7 units, and fiberglass wheel arch extensions were added, giving the car the fundamental look it kept until the end of its production run. An optional V-shaped spoiler was available over the rear deck, which, while improving high-speed stability, reduced the top speed by at least 10 MPH. Most owners ordered the wing. The handling of the LP 400S was improved by the wider tires which made the car more stable in cornering. Aesthetically, some prefer the slick lines of the original while others prefer the more aggressive lines of the later models, beginning with the LP 400S. The standard emblems ("Lamborghini" and "Countach") were kept at the rear, but an angular "S" emblem was added after the "Countach" on the right side.
There are three distinct Countach LP 400S Series:
Series One: The first 50 cars delivered with Campagnolo "Bravo" wheels in 1978 and '79. The very early 1978 cars had the original LP 400 steering wheel. Small Stewart Warner gauges, 45 mm carburettors and a lowered suspension (lowbody) setting is a trademark feature of this celebrated first series. Halfway through 1979's production, bigger gauges were employed. Fifty cars were built and the last one is noted to be 1121100*.
Series Two: These cars are recognized by their smooth finish dished/concave wheels, and still retain the lowbody setting. One hundred five cars were built and the last one is noted to be 1121310*.
Series Three: It is claimed that from chassis number 1121312 onwards, the cockpit space available was raised by 3 cm. These cars are recognized by their raised suspension setting. Eighty two cars were built, and the last one is noted to be 1121468*.
1982 saw another improvement, this time giving a bigger, more powerful 4.8 litre engine. The bodywork was unaltered. This version of the car is sometimes called the LP 5000S, which may cause confusion with the later 5000QV (1985).
Source: Wikipedia, 2012