If the persistent rumours prove to be correct, Porsche's entry level models will be powered by a four-cylinder engine in the near future. As most enthusiasts know, Porsche is no stranger to four-cylinder engines and in fact all of the early production and competition cars were equipped with one. Among them was the 550A RS Spyder competition car built between 1956 and 1958. It was the second generation of Porsche's first purpose-built racer and featured a new tubular spaceframe chassis in combination with the very powerful, twin-cam 'Carrera' engine. Over a two-year period, Porsche produced close to 50 examples, which were raced the world over by the factory team and numerous privateers. Featured in our revised article are six different examples.
It is hard to image that the Porsche 907K was built just a decade later and it underlines the enormous progress made during the 1960s by the German manufacturer in particular and the whole industry in general. Powered by an eight-cylinder engine, the 907 provided Porsche with machine that could vie for outright victories rather than class wins at most major events. Accordingly, the 907K brought the German manufacturer's first outright win at Sebring and also won the Targa Florio. It would serve less than a full season as it was replaced halfway through 1968 by the more potent still 908. A rare sight today, we feature three different chassis, pictured on both sides of the Atlantic.
Caterham Cars has today launched a line of three new models that fit between the range-topping Seven 620R and the entry-level Seven 160. These are respectively the 210 bhp Seven 420, the 180 bhp Seven 360 and the 135 bhp Seven 270. Each of the new models can be ordered with the optional 'S' and 'R' packages, which have the aim to further improve the handling and feel of the Seven.

Enjoy the links:

2015 Caterham Seven 420R - Images, Specifications and Information

2015 Caterham Seven 360R - Images, Specifications and Information

2015 Caterham Seven 270R - Images, Specifications and Information

2015 Caterham Seven 270S - Images, Specifications and Information

1967 - 1968 Porsche 907K - Images, Specifications and Information

1956 - 1958 Porsche 550A RS Spyder - Images, Specifications and Information