The Porsche is a toy car staple and Slot racing sets are no exception. The very first Porsche created for Speedtrack and PT-2000 was an inferior moulding that looked like a Porsche, but lacked the Matchbox craft that adorned many of the other cars. The Corvette of this period too, also suffered.
The Porsche was modelled loosely on the 934 RSR as raced by the Kremer team in 1974. It was a seriously fast car, but by the time Powertrack came to market the 935 Turbo was coming to the fore and this looked rather dated at launch. However, the rush to market with a slot car clearly meant the Porsche 'would do for now'.
With the UK launch of Powertrack Plus in 1981/2 Matchbox introduced the revised Porsche 911 Turbo, the now familiar red 'Esso' Kremer Porsche found in the Matchbox PP-9000 set. However, the version above is an old Mark 1 Porsche with the Mark 2 graphics applied to it. This photo example a very rare model indeed and hence worth a serious premium over any other.
While the UK got the faux 'Vaillant' livery of European racing scene, the US got a very smart faux 'Gulf' oil scheme. This is a white wheeled example and there are later grey wheeled versions, so a mint white wheeler would command a small premium over normal versions. Interestingly, the front axle widths were narrower on these bodies and the UK front axle does not fit without bushes - this is also true of the Corvette from this period.