tiistai 27. marraskuuta 2012

Maserati Mistral and similar AC 428

Maserati Mistral

 The Maserati Mistral (Tipo 109), named after a cold northerly wind of southern France, was the successor to the iconic 3500 GT, it was also the first in a series of classic Maseratis to be given the name of a wind. It was offered both in Coupe and Spyder form. 830 coupes and 120 Spyders were built in total.

The Mistral is the last model from the "Casa del Tridente" or “House of the Trident” to have the famous straight six cylinder, twin-spark, double overhead cam engine, as fitted to the Maserati 250F Grand Prix cars that won 8 Grand Prix between 1954 and 1960 and one F1 World Championship in 1957 driven by Juan Manuel Fangio. The engine also featured hemispherical combustion chambers and was fed by a Lucas indirect fuel injection system which was novelty at the time for Italian car manufacturers. Although the Lucas fuel injection system enhances performance, quite a few owners, especially in the U.S. have converted their cars to Weber carburetors due to difficulties in tuning the system properly. Maserati subsequently moved on to V8 engines for their later production cars. There were three engine variants fitted to the Mistral; 3500, 3700 and 4,000 cc. The most sought after derivative is the 4000 cc model. Only the earliest of the Mistrals were equipped with the 3500 cc engine. Unusually, the body was offered in both aluminum and steel but no one is quite sure as to how many of each were built. Use of the aluminum body panels had no effect on the performance of the Mistral. The mixture of the aluminum body on a steel substructure can lead to corrosion due to the dissimilar metals. The automobile was standard with a five speed transmission from ZF and also had four wheel solid disc brakes. As was Maserati's practice at the time the front suspension was independent while the rear made do with a solid axle. Speed for the 3.7 liter engine and the 4.0 liter engine was around 7 seconds or a little better and the top speed was around 140 mph (225 km/h) to 145 mph (233 km/h).

The body which had been designed by Pietro Frua was first shown in a preview at the Salone Internazionale dell'Automobile di Torino in November 1963. The Maserati Mistral is generally considered as one of the most beautiful Maserati of all time. It is also often confused to the very similar looking but larger and more powerful AC Frua, which was a Frua design as well.

AC 428

CarroThe AC Frua or AC 428 is a British GT built by AC Cars from 1965 to 1973. With an Italian body, British chassis, and American big block V8 it is a true hybrid. Production was 81 cars built in total: 49 coupés (known as fastbacks), 29 convertibles, and 3 special bodied.

ll Shelby's involvement had not only prolonged the life of the AC Ace but also resulted in the further development of the tubular chassis that was first designed in the early 1950s. Intended to hold the company's big-block '427' V8, Ford had created the 'Mk III' Cobra with a reinforced chassis. AC owner Derek Hurlock wasted no opportunity to use the beefed-up frame for an all new Grand Tourer to rival all the prestigious manufacturers the Cobra had beaten on the track.

To add the necessary prestige to the potent Cobra, Hurlock sent a slightly modified Mk III chassis to Italian coach-builder Pietro Frua in 1965. The biggest difference was the increased length (6 in or 152 mm) of the tubular frame. This allowed for a little more interior space than was standard for the Cobra. Initially, Frua was asked to draw up the design and to only built a prototype. The production bodies were to be produced in England to keep the costs down.

For the exterior design of the new AC, Pietro Frua continued along the lines of the highly acclaimed Maserati Mistral, he penned a few years earlier. Although there are many detail differences, the two machines look strikingly similar. Both feature the slightly recessed and immediately recognizable headlights and also feature identical doors. This is far from a bad thing as the Mistral and subsequently the AC are regarded as Pietro Frua's finest designs.

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  1. The Maserati Mistral (Tipo 109), named after a cold northerly wind of southern France, was the successor to the iconic 3500 GT, it was also the ... msrwatch.blogspot.com


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